optimizing classroom structure
...英语教学；优化课堂结构；优化教学手段；优化教学内容 [gap=4074]Key words: English teaching; optimizing classroom structure; optimizing teaching instruments; optimizing teaching contents ..
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optimizing classroom structure
优化教室结构
以上为机器翻译结果，长、整句建议使用 人工翻译 。