片语
foreign language lexical acquisition外语词汇习得
second language vocabulary acquisition二语词汇习得
Second Language Acquisition第二语言习得
Second Language Phonetic Acquisition二语语音习得
language-acquisition devise语言学习器官
language e acquisition语言习得
foreign language periodicals acquisition外文期刊采访
First Language Vocabulary Acquisition母语词汇习得
Foreign Language Vocabulary Acquisition外语词汇习得