名词
中文翻译：钥匙
同义词：
['key', 'lock', 'handle', 'bolt']
例句：
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1. He found the key to the door and opened it.
他找到了钥匙，打开了门。
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2. The key to solving this problem lies in understanding the underlying principles.
解决这个问题的关键在于理解其背后的原理。
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3. She kept her keys on a hook by the door.
她把钥匙挂在门边的钩子上。