Ming wang jun feng (29 resultados)
- Tapa blanda
Librería: liu xing, Nanjing, JS, Chinaliu xing
Contactar con el vendedorVendedor de 5 estrellasCondición: Nuevo
EUR 61,75
Envío por EUR 15,73Se envía de China a Estados Unidos de AmericaCantidad disponible: 3 disponibles
paperback. Condición: New. Paperback.Pub Date:2023-08 Pages:138 Language:Chinese Publisher:Beijing Institute of Technology Press This book aims to help secondary vocational students solve many problems in interpersonal communication. cultivate their ability to control interpersonal relationships in a targeted manner. and enable…them to consciously and purposefully coordinate various interpersonal relationships around them. so that they can become knowledgeable and well-rounded people. understand society. be good at dea.
Meta Learning Learner's Notes(Chinese Edition)
WANG WEN FENG RUAN JUN HU HUANG FA MING ZHOU MU WANG HAI YANG
- Tapa blanda
Librería: liu xing, Nanjing, JS, Chinaliu xing
Contactar con el vendedorVendedor de 5 estrellasCondición: Nuevo
EUR 78,26
Envío por EUR 15,73Se envía de China a Estados Unidos de AmericaCantidad disponible: 1 disponibles
paperback. Condición: New. Language:Chinese.Paperback. Pub Date: 2025-04 Publisher: Tsinghua University Press Metalearning algorithms can adjust their structure and parameter space in a timely manner based on feedback signals from their performance. thereby improving performance in new environments through accumulated experience…. This is a crucial step towards machine autonomous learning and strong artificial intelligence. This book is suitable for all readers interested in artificial intelligence. Aimed at beginners i.
Editorial: Hebei People s Publishing House, 1991
- Tapa blanda
Librería: liu xing, Nanjing, JS, Chinaliu xing
Contactar con el vendedorVendedor de 5 estrellasCondición: Nuevo
EUR 41,71
Envío por EUR 15,73Se envía de China a Estados Unidos de AmericaCantidad disponible: 1 disponibles
paperback. Condición: New. Language:Chinese.Paperback. Publisher: Hebei People s Publishing House. This book reflects our focus on the party in the new century and new stage of the historical experience of the ruling party of science.
Editorial: Shanghai People's Publishing House (collection
- Tapa blanda
Librería: liu xing, Nanjing, JS, Chinaliu xing
Contactar con el vendedorVendedor de 5 estrellasCondición: Nuevo
EUR 43,89
Envío por EUR 15,73Se envía de China a Estados Unidos de AmericaCantidad disponible: 1 disponibles
Soft cover. Condición: New. Language:Chinese.Author:WANG ZHUO KANG ZHAN ZHONG DI ZHONG GUO KONG JUN MING FU TU SHU GUAN SHI MO ZHONG GUO FENG REN JI CHANG DE XING SHUAI.Binding.Publisher:Shanghai People's Publishing House (collection.
Idioma: Inglés
- Tapa blanda
Librería: liu xing, Nanjing, JS, Chinaliu xing
Contactar con el vendedorVendedor de 5 estrellasCondición: Nuevo
EUR 54,82
Envío por EUR 15,73Se envía de China a Estados Unidos de AmericaCantidad disponible: 1 disponibles
paperback. Condición: New. Language:Chinese.Paperback Pages Number: 378 of Flash MX 2004 Macromedia introduced a very good website interactive vector animation software. It provides cross-platform. high-quality. small file size. can be embedded in the audio and video. as well as excellent interactive features and other features.… Flash MX 2004 Chinese version of entry and increase the focus on the real shaggy sex. the main line. a typical. practical examples. supplemented by line to Flash software functionality. allowin.
Editorial: The people of Tianjin; 1 edition (May 1, 2007), 2000
- Tapa blanda
Librería: liu xing, Nanjing, JS, Chinaliu xing
Contactar con el vendedorVendedor de 5 estrellasCondición: Nuevo
EUR 53,36
Envío por EUR 15,73Se envía de China a Estados Unidos de AmericaCantidad disponible: 1 disponibles
paperback. Condición: New. Language:Chinese.Paperback Pages Number: 415 Publisher: Tianjin People's; 1 edition (May 1. 2007).
- Tapa blanda
Librería: liu xing, Nanjing, JS, Chinaliu xing
Contactar con el vendedorVendedor de 5 estrellasCondición: Nuevo
EUR 63,70
Envío por EUR 15,73Se envía de China a Estados Unidos de AmericaCantidad disponible: 1 disponibles
paperback. Condición: New. Ship out in 2 business day, And Fast shipping, Free Tracking number will be provided after the shipment.Pub Date :2013-06-01 Language: Chinese Publisher: China Renmin University Press 21st Century Law Textbook Series : Law and Economics is a law and economics teaching and research in the latest authori…tative work by the domestic first-class and middle-aged French economy scholars have put together complete co-operation . Introduced a system of basic assumptions of law and economics . basic category . the main theorem. value orientation and methodology are discussed in detail cost-effective lega.Four Satisfaction guaranteed,or money back.
- Tapa blanda
Librería: liu xing, Nanjing, JS, Chinaliu xing
Contactar con el vendedorVendedor de 5 estrellasCondición: Nuevo
EUR 51,16
Envío por EUR 15,73Se envía de China a Estados Unidos de AmericaCantidad disponible: 1 disponibles
paperback. Condición: New. Language:Chinese.Paperback. Publisher: Traditional Chinese Medicine.
- Tapa blanda
Librería: liu xing, Nanjing, JS, Chinaliu xing
Contactar con el vendedorVendedor de 5 estrellasCondición: Nuevo
EUR 64,53
Envío por EUR 15,73Se envía de China a Estados Unidos de AmericaCantidad disponible: 5 disponibles
paperback. Condición: New. Pub Date: 2014-05-01 Pages: 252 Language: Chinese Publisher: Hubei People's Publishing House blood source management and rational clinical use of blood from Enshi Autonomous Prefecture Central Hospital laboratory. blood bank transfusion therapy combined with years of clinical experience. and risk manag…ement. Referring to the blood-related laws and regulations and literature written in. Blood source management and rational clinical use of blood. based upon the traditional way most readers are .
- Tapa blanda
Librería: liu xing, Nanjing, JS, Chinaliu xing
Contactar con el vendedorVendedor de 5 estrellasCondición: Nuevo
EUR 51,68
Envío por EUR 15,73Se envía de China a Estados Unidos de AmericaCantidad disponible: 1 disponibles
paperback. Condición: New. Language:English.Pages Number: 261 Publisher: Xi'an Jiaotong University Pub. Date :2009-07-01 version 1. Contents: Read part one test point two. three reading strategies. analysis of a key word template template template analysis of two tests of analysis of 3 general kinds of questions genre analysis o…f 4 key themes template analysis template analysis template 5 high and difficult questions to read the new kinds of questions Cloze translation (English-Chinese translation) of the Cloze (knowle.
- Tapa blanda
Librería: liu xing, Nanjing, JS, Chinaliu xing
Contactar con el vendedorVendedor de 5 estrellasCondición: Nuevo
EUR 71,13
Envío por EUR 15,73Se envía de China a Estados Unidos de AmericaCantidad disponible: 3 disponibles
paperback. Condición: New. Paperback. Pub Date: 2014-6-30 Pages: 368 Publisher: Science Press Laser Sensing and Measurement focuses on 51 core MCU and C51 programming. The first seven chapters introduce the old 51 microcontroller architecture. instruction and assembly. C51 MCU program design and 51 communication interfaces. ADC…and DAC interface. The first chapter introduces siliconLaboratories 8-9 enhanced the company's 51 core microcontroller C8051F330. Chapter 10 introduces smart electronics interface technology. Ar.
- Tapa blanda
Librería: liu xing, Nanjing, JS, Chinaliu xing
Contactar con el vendedorVendedor de 5 estrellasCondición: Nuevo
EUR 72,48
Envío por EUR 15,73Se envía de China a Estados Unidos de AmericaCantidad disponible: 5 disponibles
paperback. Condición: New. Paperback. Pub Date: 2017-02-01 Pages: 114 Language: Chinese Publisher: People's Publishing House Chinese agriculture. rural reform and development experienced magnificent. as Chinese economic transition successfully accumulated valuable experience. but also caused the whole the world's attention. And…the rest of the world exchange development of agriculture. rural experience. to share the rich .
- Tapa blanda
Librería: liu xing, Nanjing, JS, Chinaliu xing
Contactar con el vendedorVendedor de 5 estrellasCondición: Nuevo
EUR 72,93
Envío por EUR 15,73Se envía de China a Estados Unidos de AmericaCantidad disponible: 1 disponibles
paperback. Condición: New. Paperback. Pub Date: 2010 Pages: 389 Language: Chinese in Publisher: Tsinghua University Press UG NX6 injection mold design training tutorial to UG NX6 Mold Wizard of global training materials modeled mainly on the application of UG NX6 Mold Wizard module . The module supports the typical plastic mold…design process. from reading the product model. to the direction of how to identify and construct mold shrinkage cavity layout parting surface. core. cavity. sliders within the pumping core. for.
- Tapa blanda
Librería: liu xing, Nanjing, JS, Chinaliu xing
Contactar con el vendedorVendedor de 5 estrellasCondición: Nuevo
EUR 73,76
Envío por EUR 15,73Se envía de China a Estados Unidos de AmericaCantidad disponible: 5 disponibles
paperback. Condición: New. Language:Chinese.Paperback. Pub Date: 2015-11-01 Publisher: Machinery Industry Press NX MoldWizard Injection Mold Design Primer by a large number of detailed examples of products. progressive. gradual. systematic introduction SiemensNXMoldWizard injection mold design. The book consists of eight chapter…s. each from NX injection mold design based on pre-processing stage mold design. mold tools. parting design. mold base. standard mold parts and other structural design and other aspects of the d.
Vernacular after Strange Tales (signed hardcover Kang Sujuan for gifts this)(Chinese Edition)(Old-Used)
[ QING ] WANG TAO YUAN ZHU LI XIAO MING KANG SU JUAN KOU JUN FENG DENG YI
- Tapa dura
Librería: liu xing, Nanjing, JS, Chinaliu xing
Contactar con el vendedorVendedor de 5 estrellasCondición: Usado - Aceptable
EUR 58,08
Envío por EUR 15,73Se envía de China a Estados Unidos de AmericaCantidad disponible: 1 disponibles
Hardcover. Condición: Good. HardCover. Pub Date :1996-03 Pages: 689 Publisher: SANQIN Press sheets: 22.
The vernacular after Liaozhaizhiyi hardshell hardcover edition printed only printed 8000(Chinese Edition)(Old-Used)
[ QING ] WANG TAO YUAN ZHU LI XIAO MING KANG SU JUAN KOU JUN FENG DENG YI WANG ZHI WU SHEN JIAO
- Tapa dura
Librería: liu xing, Nanjing, JS, Chinaliu xing
Contactar con el vendedorVendedor de 5 estrellasCondición: Usado - Aceptable
EUR 58,08
Envío por EUR 15,73Se envía de China a Estados Unidos de AmericaCantidad disponible: 1 disponibles
Hardcover. Condición: Good. The vernacular after Liaozhaizhiyi hardshell hardcover edition printed only printed 8000.
Corporate Financial Management(Chinese Edition)
LI CHUAN JUN . LI QIANG . WANG MIN . ZAN XIN MING . LI FENG BIAN
- Tapa blanda
Librería: liu xing, Nanjing, JS, Chinaliu xing
Contactar con el vendedorVendedor de 5 estrellasCondición: Nuevo
EUR 78,26
Envío por EUR 15,73Se envía de China a Estados Unidos de AmericaCantidad disponible: 3 disponibles
paperback. Condición: New. Paperback. Pub Date: 2020-08-01 Pages: 268 Language: Chinese Publisher: Tsinghua University Press Enterprise Financial Management is compiled based on the current newly adjusted corporate accounting system and new achievements in the field of financial management.?The book consists of 10 chapters. the…main content includes the general theory of financial management. currency value and value evaluation. financial analysis. financial strategy and financial budget. long-term financing methods. c.
Oral Diseases External Therapy with TCM Characteristics 223 Methods/Contemporary TCM External Therapy Clinical Series(Chinese Edition)
MENG HONG JUN . WANG KAI FENG . WANG HONG MEI . WANG LIN FAN . PANG GUO MING DENG BIAN
- Tapa blanda
Librería: liu xing, Nanjing, JS, Chinaliu xing
Contactar con el vendedorVendedor de 5 estrellasCondición: Nuevo
EUR 61,75
Envío por EUR 15,73Se envía de China a Estados Unidos de AmericaCantidad disponible: 3 disponibles
paperback. Condición: New. Paperback. Pub Date: 2021-05-01 Pages: 98 Language: Chinese Publisher: China Medical Science and Technology Press. Oral Diseases External Therapy of Traditional Chinese Medicine 223 Methods/Contemporary External Therapy of Traditional Chinese Medicine Clinical Series consists of two chapters and eighte…en sections.?The first chapter is an introduction. which systematically introduces the development history. common external treatment methods. mechanism of action. ideas and methods for improvin.
- Tapa blanda
Librería: liu xing, Nanjing, JS, Chinaliu xing
Contactar con el vendedorVendedor de 5 estrellasCondición: Nuevo
EUR 83,21
Envío por EUR 15,73Se envía de China a Estados Unidos de AmericaCantidad disponible: 3 disponibles
paperback. Condición: New. Paperback. Pub Date: 2021-11-01 Pages: 328 Language: Chinese Publisher: East China Normal University Press. the book Artificial Intelligence in Education published by experts from the American Curriculum Redesign Center. focuses on what to learn in the era of artificial intelligence and How to learn tw…o major themes are discussed.?This book advocates that in the era of artificial intelligence. learning content should revolve around basic knowledge (core concepts and basic content) and basic a.
Institutions of higher art architecture and environmental art design planning materials and design expression: design intent Analysis and referral(Chinese Edition)
ZHAN XU JUN . WANG MING FENG . LIANG JING YUN. LV PIN JING . ZHANG HUI ZHEN
- Tapa blanda
Librería: liu xing, Nanjing, JS, Chinaliu xing
Contactar con el vendedorVendedor de 5 estrellasCondición: Nuevo
EUR 63,70
Envío por EUR 15,73Se envía de China a Estados Unidos de AmericaCantidad disponible: 1 disponibles
paperback. Condición: New. Ship out in 2 business day, And Fast shipping, Free Tracking number will be provided after the shipment.Paperback. Pub Date: November 2012 Pages: 97 Publisher: China Building Industry Press. the national institutions of higher art architecture and environmental art design planning materials and design…expression: the design intent profiling Referrals Chapter elaborate on basic understanding of design expression. and the quality of the skills of the designer should have the basic structure of the book at the same time do a comb. The second chapter analyzes the owners actually discuss the responsibilities of the designer and social attributes. Express the design of this chapter. the main focus on the pre-conceptual design stage and the design stage. Early conceptual design phase focused on project planning. to clarify the direction of cost-effective projects may be the development of various types of pictures. tables. sketches. investigation files. and other means to the owners; design phase of the program focused on the design expression. Chapter expression of self-object design is more focused on the communication of the designer's own brain and hand. concern the design process. to capture the minds of inspiration through a variety of conditions. and clear and principled. Chapter 4 describes the basic characteristics of the expression of the public object design. including design document standard mapping standard file format standard. the standard of the depth of content. logical organization of the design documents. the ultimate goal is that even if the design the division absent. others view drawings clear and complete insight into the designer needs to express intent. Contents: General Preface Preface Chapter 1 Introduction 1.1 the 1.2.1 owners object design design to expression 1.2 design expression areas express 1.2.2 self-object design to express 1.2.3 to the public for the design of the object expression 1.3 design expression 1.3.1 design expression of the required knowledge and skill level of the knowledge level 1.3.1.1 building economic 1.3.1.2 Design Management 1.3.2 Design and Expression of the skills needed to level 1.3.2.1 logical thinking 1.3.2.2 hand-painted expression 1.3.2.3 computer graphics 1.3.2.4 expression contagious Chapter 2 owners object design express 2.1 Who are the owners? 2.1.1 Public 2.1.2 designers employed by 2.1.3 final users 2.2 for the design of the design - design preliminary work 2.2.1 site investigation and analysis of the the 2.2.2 site location and contents 2.2.3 venue infrastructure the distribution 2.2.4 local microclimate Investigation 2.2.5 users and venues relations 2.2.6 Sensory analysis 2.2.7 social needs 2.3 project money? 2.4 impatient owners - graphic expression of Project Economic Analysis 2.3.2 Economic Analysis 2.3.1 The economic analysis of the need for and purpose of the steps and the main method 2.5 How cool - the conceptual design stage control and fast graphic expression to convince your landlord? - Convey design intent expression of self-object design skills Chapter 3 3.1.2 reflects 3.1 thinking graphic expression 3.1.1 reflect features graphic expression of the function of the basic elements of the relationship between 3.1.1.2 3.1.1.1 function partition plane 3.1.3.1 forms of graphic expression of the graphical representation of the space 3.1.2.1 space scales 3.1.2.2 the space enclosed 3.1.2.3 space combined 3.1.2.4 light space to create a form of 3.1.3 reflect the change in the form of basic elements 3.1.3.2 3.1. graphic expression of the 3.3 in the form of surface 3.1.4 reflect 3.1.4.1 constructed 3.1.4.2 Space and the relationship between the expression of the idea of ??the 3.2 graphics environment 3.2.1 3.2.3 3.2.2 Symbols of the relationship between the 4th and the public abstract exchange of design expression 4.1 designed to express the new connotation of expression open channels of communication with the public 4.1.1 4.1.2 exchange new design expression requir.
Fault Control and Safety Design of Autonomous Submersible(Chinese Edition)
ZHANG MING JUN . YAO FENG . LIU XING . WANG YU JIA . ZHAO WEN DE
- Tapa blanda
Librería: liu xing, Nanjing, JS, Chinaliu xing
Contactar con el vendedorVendedor de 5 estrellasCondición: Nuevo
EUR 87,34
Envío por EUR 15,73Se envía de China a Estados Unidos de AmericaCantidad disponible: 3 disponibles
paperback. Condición: New. Paperback. Pub Date: 2022-04-01 Pages: 170 Language: Chinese Publisher: Harbin Engineering University Press Based on the research progress of fault control technology. the theory and technology of autonomous submersible propeller weak fault diagnosis. autonomous submersible fault-tolerant control. auto…nomous submersible safety decision-making and dump self-rescue are expounded. trying to give a systematic . Practical autonomous submersible fault control system framework. This book is informat.
LTE FDD network planning and design (second five key national book publishing planning project)(Chinese Edition)
CHENG HONG YAN ZHU CHEN MING WANG TAI FENG KONG FAN JUN FANG XIAO NONG XU HUA DONG
- Tapa dura
Librería: liu xing, Nanjing, JS, Chinaliu xing
Contactar con el vendedorVendedor de 5 estrellasCondición: Nuevo
EUR 104,15
Envío por EUR 15,73Se envía de China a Estados Unidos de AmericaCantidad disponible: 3 disponibles
Hardcover. Condición: New. Language:Chinese.HardCover. Pub Date: 2013-8-1 Pages: 441 Publisher: People Post Press LTE FDD network planning and design is divided into theoretical papers. planning papers. design articles. practical articles 4. visitors to learn the complete LTE architecture. network evolution and knowledge network… planning and construction. among theoretical papers involving the EPC Network. E-UTRA network and bearer network three chapters. planning chapter introduces the core network. LTE wireless netwo.
David illustrated edition of the Chinese idiom story culture(Chinese Edition)
FENG YUAN . SHENG YUAN LONG . WANG HAI MING . ZHENG KAI JUN DENG
- Tapa blanda
Librería: liu xing, Nanjing, JS, Chinaliu xing
Contactar con el vendedorVendedor de 5 estrellasCondición: Nuevo
EUR 81,03
Envío por EUR 15,73Se envía de China a Estados Unidos de AmericaCantidad disponible: 1 disponibles
paperback. Condición: New. Ship out in 2 business day, And Fast shipping, Free Tracking number will be provided after the shipment.David illustrated edition of the Chinese idiom story cultureFour Satisfaction guaranteed,or money back.
Distribution line operation and maintenance and repair technology (distribution network professional training technology series)(Chinese Edition)
ZHU BIAN . WANG QIU MEI . ZHU MING ZHU . YANG LU FENG . XU DA JUN . ZHANG BO . FU BIAN
- Tapa blanda
Librería: liu xing, Nanjing, JS, Chinaliu xing
Contactar con el vendedorVendedor de 5 estrellasCondición: Nuevo
EUR 85,69
Envío por EUR 15,73Se envía de China a Estados Unidos de AmericaCantidad disponible: 3 disponibles
paperback. Condición: New. Paperback. Pub Date: 2018-02-01 Pages: 176 Language: Chinese Publisher: China Water Conservancy and Hydropower Press Installation. process standards and acceptance. inspection project requirements and operation and maintenance of overhead lines. condition maintenance of overhead lines. anti-accident te…chnical measures and requirements for overhead lines. operation and maintenance of grounding devices. case analysis of typical faults of overhead lines. basic knowledge of power cables. Cable de.
- Tapa blanda
Librería: liu xing, Nanjing, JS, Chinaliu xing
Contactar con el vendedorVendedor de 5 estrellasCondición: Nuevo
EUR 85,69
Envío por EUR 15,73Se envía de China a Estados Unidos de AmericaCantidad disponible: 3 disponibles
paperback. Condición: New. Paperback. Pub Date: 2021-06-01 Publisher: Communication University of China Press This textbook is suitable for children aged 5-6.?In this stage. we take Animal Kingdom as the theme to cultivate children's language skills in popular science animal knowledge; add basic exercises such as facial exercise…s and breath training to cultivate children's correct pronunciation habits; in this stage. The type of learning content is richer. and the difficulty is slightly improved. At the same time. the .
- Tapa blanda
Librería: liu xing, Nanjing, JS, Chinaliu xing
Contactar con el vendedorVendedor de 5 estrellasCondición: Nuevo
EUR 85,69
Envío por EUR 15,73Se envía de China a Estados Unidos de AmericaCantidad disponible: 3 disponibles
paperback. Condición: New. Paperback. Pub Date: 2021-06-01 Publisher: Communication University of China Press Brief Introduction This textbook is suitable for children aged 4-5.?In this stage. we take Global Adventure as the theme to cultivate children's interest in reading and let children learn happily; through etiquette learn…ing. let children speak civilization. understand politeness. and establish good etiquette habits; at the same time. through fun oral exercises The practice and the recitation of different types .
- Tapa blanda
Librería: liu xing, Nanjing, JS, Chinaliu xing
Contactar con el vendedorVendedor de 5 estrellasCondición: Nuevo
EUR 102,20
Envío por EUR 15,73Se envía de China a Estados Unidos de AmericaCantidad disponible: 5 disponibles
paperback. Condición: New. Paperback. Pub Date: 2018-04-01 Language: Chinese Publisher: social sciences academic press book for the 2014 national soft science major project the key to the development of innovation drive problem study (project number: 2014 gxs1b003) of final results. chapter ten.To foster innovation driven develo…pment strategy implementation is a systematic project. both.
Polygonatum multiflorum(Chinese Edition)
LIU YUE JUN . JIANG YAN FENG . WANG SHENG MIAO . CENG YUE MING . XIE JIAN QIU
- Tapa blanda
Librería: liu xing, Nanjing, JS, Chinaliu xing
Contactar con el vendedorVendedor de 5 estrellasCondición: Nuevo
EUR 103,84
Envío por EUR 15,73Se envía de China a Estados Unidos de AmericaCantidad disponible: 3 disponibles
paperback. Condición: New. Paperback.Pub Date:2021-01-01 Pages:188 Language:Chinese Publisher:China Agriculture Press This book is a monograph of Polygonatum vulgaris. which condenses the scientific research results of the traditional Chinese medicinal materials team of the former Lishui Academy of Forestry Sciences. It mainly i…ntroduces The bio-ecological characteristics of Polygonatum multiflorum. selection and breeding of new varieties. seedling breeding technology. understory compound management technology. develop.
Songpanan. Sanchuan. China Endangered Language(Chinese Edition)
HUANG CHENG LONG . WANG BAO FENG . MAO MING JUN . ZHANG XI . CAO ZHI YUN BIAN
- Tapa dura
Librería: liu xing, Nanjing, JS, Chinaliu xing
Contactar con el vendedorVendedor de 5 estrellasCondición: Nuevo
EUR 136,86
Envío por EUR 15,73Se envía de China a Estados Unidos de AmericaCantidad disponible: 5 disponibles
Hardcover. Condición: New. Hardcover. Pub Date: 266 Language: Chinese Publisher: Commercial Press Sichuan Song Pan Yarin China Endangered Language is the Ministry of Education. the national language commission. China Language Resources Protection Project Endangered Language Project Subject The Final Achievements of Nanyue North…Dialect. Projects can be smooth and can .
