名词
中文翻译：钥匙
同义词：
['key', 'lockpick', 'keyring']
例句：
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1. The old man had lost his keys and couldn't open the door.
老人丢了钥匙，打不开门。
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2. She kept her keys in a safe place so she wouldn't lose them.
她把钥匙放在安全的地方，以防丢失。
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3. He tried to pick the lock with his bare hands but failed.
他试图用双手撬锁，但失败了。