Vocabulary is a basic component of language proficiency,which provides the basis for learners'performance in other skills,such as listening,speaking,reading and writing.Incidental vocabulary acquisition,first put forward by Nagy,Herman and Anderson,plays a critical role in vocabulary teaching and learning.This paper first reviews the theories,hypothesis,definitions and its implications related to incidental vocabulary acquisition and teaching,and then it discusses several factors which affect inciden-tal vocabulary acquisition.%词汇是语言能力的一个基本组成部分,是学习者其他技能如听、说、读、写等技能的基础."词汇附带习得"这一概念,最早由Nagy,Herman和Anderson提出,在词汇习得和教学中起着至关重要的作用.本文首先回顾了国内外关于词汇附带习得的各种理论、假说、定义及其内涵.然后讨论了影响词汇附带习得的各种因素以及对二语词汇习得的教学启示.
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