... 禁止拍照{No photos!} 在课堂上保持安静{keep quiet in the class} 三双旧鞋子{three pairs of shoes } ...
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keep quiet in the class
在课堂上保持安静
以上为机器翻译结果，长、整句建议使用 人工翻译 。
The teacher asks the boys to keep quiet in class.
老师告诉这些男生在课堂上保持安静。
youdao
In order to guarantee all the members have a quiet practice environment, you must keep quiet in Venues. Close your phones before you come into the class.
为保证广大会员有一个宁静的习练环境，请勿在场馆内大声喧哗，进入教室前请主动关闭手机；
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