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N-COUNT
门闩；插销
A latch is a fastening on a door or gate. It consists of a metal bar which you lift in order to open the door.
例句
You left the latch off the gate and the dog escaped.
你没把门闩插上，所以狗跑了。
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N-COUNT
碰锁；弹簧锁
A latch is a lock on a door which locks automatically when you shut the door, so that you need a key in order to open it from the outside.
例句
...a key clicked in the latch of the front door.
钥匙插进前门弹簧锁里发出咔嗒一声
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VERB
用闩闩上；用碰锁锁上
If you latch a door or gate, you fasten it by means of a latch.
例句
He latched the door, tested it, and turned around to speak to Frank.
他把门锁上，又试了试，然后转身和弗兰克说话。