How many people are there in your classroom?

有多少个人在你的教室里？

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Go and see how many chairs we have in that classroom, but don't count in the broken ones.

去看看那个教室里有多少把椅子，不过坏的不要算进去。

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How many students will recall the laughter of the classroom and always on the lookout thoughts?

多少学生会回想起课堂上的欢声笑语和求贤若渴的思绪？

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how many teachers working in the classroom ? day in and day out know about the Pygmalion effect?

有多少教师在课室努力工作,日复一日地研究皮格马利翁效应？

哈佛公开课 - 幸福课课程节选

How many teenagers have we seen hanging around on street corners when they should be sitting in a classroom?

CNN: Obama's Father's Day speech