1.Definition of Second language acquisition: It refers to a systematic study of how one person acquires a cond language subquent to his native language.Acquisition习得: 无意识地学会现代词Learning学习：通过系统学习语法规
舒服的拼音数拼音第6章如何学习一门语言Ⅰ. Fill in the blanks.1. The type of language constructed by cond or foreign language learners who are still in the process of learning a language is often referred to as ______.
