After the middle of 1980s, the research of SLA in classroom Settings started to be popular.

二十世纪八十年代中后期，对在课堂环境下的二语习得的研究开始热门起来。

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After the middle of 1980s, the research of SLA in classroom Settings started to be popular.

二十世纪八十年代中后期，对在课堂环境下的二语习得的研究开始热门起来。

youdao