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检查本该是出其不意的，但有时候管理员会提前通知。
The inspections were supposed to be a surprise, but keeper sometimes had advance notice。
youdao
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迈克尔考虑得很周到，他提前通知了我们他会耽搁一会儿。
It was considerate of Michael to inform us of his delay.
youdao
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如果你真的无法上课，应该提前通知我。
If you must miss a class, you should notify me in advance.
youdao