v.
1.
VERB
松开；解开 If you unfasten something that is closed, tied, or held together, or if you unfasten the thing holding it, you loosen or remove the thing holding it.
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When Ted was six we decided that he needed to know how to fasten and unfasten his seat belt...
特德六岁的时候，我们认为他得知道如何系上和解开安全带了。
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Reaching down, he unfastened the latch on the gate...
他伸手打开了门闩。
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He once emerged from the toilets with his flies unfastened.
有一次他裤链没拉就出了厕所。
