Definition
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let
To allow someone to do something or to give permission.
允许某人做某事或给予许可。
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Please let me know if you need any help.
请告诉我如果你需要任何帮助。
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I will let you borrow my book for a week.
我会让你借我的书一周。
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They let the children play outside for a while.
他们让孩子们在外面玩了一会儿。