Ask the students must get to school on time or school ahead, if something can't to notice to the teacher, he is, lest needless trouble.
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lest needless trouble
避免不必要的麻烦
以上为机器翻译结果，长、整句建议使用 人工翻译 。
Filling in when insurance application must signal a case according to the facts must not hold fluky mentality lest cause needless trouble or loss to oneself.
在填写投保单时，一定要如实告知情况，切不可抱有侥幸心理，以免给自己造成不必要的麻烦或损失。
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