保持教室清洁。
I've always said that comedy is a playground, not a schoolroom.
我经常会说这么一句话：喜剧不是个大教室而是一个游乐场。
In the schoolroom next door there was a lot of noise from Sara's party.
隔壁教室里因为有萨拉的生日宴会而传来很大的喧闹声。
Mr Phillips heard the noise, and came slowly to the front of the schoolroom.
菲力普斯先生听到了这里的声音，慢慢的从教室后面走了过来。
Investigation: verified the effect of schoolroom teaching on the knowledge of health education.
调查4以验证性调查形式考察课堂教学对提高学生健康知识知晓度的影响。
Investigation: verified the effect of schoolroom teaching on the knowledge of health education.
调查4以验证性调查形式考察课堂教学对提高学生健康知识知晓度的影响。
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