102. The children are often asked not to speak loudly in the library. They must keep quiet.
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they must keep quiet
他们必须保持安静
以上为机器翻译结果，长、整句建议使用 人工翻译 。
The children are often asked not to speak loudly in the library. They must keep quiet.
孩子们经常被告知不要在图书馆大声说话。他们必须保持安静。
youdao
You must keep them quiet, and see that they behave well and do not waste their food.
你要让他们保持安静，让他们守规矩，不要浪费粮食。
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