key
[ki]
n.
钥匙;
（打字机等的）键;
关键，线索，秘诀;
（音乐的）调;
vt.
键入;
锁上;
调节…的音调;
提供线索;
vi.
使用钥匙;
adj.
关键的;
主要的;
例句:
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The key issue was whether the four defendants acted dishonestly.
关键问题是4名被告是否存在欺诈行为。
来自柯林斯例句
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Below are some key indicators of the Thatcher years.
来自BBC
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Newsround gives you the low-down on the key figures.
来自BBC
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Ian Harte is another key member of that defence.
来自BBC
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For a beach resort with a difference, try Key West.
如果想去一个与众不同的海滨度假胜地，那就去基韦斯特吧。
-
He unlocked her door and handed her back the key.
他给她打开门锁，并把钥匙交还给她。
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The key to the whole affair was his jealousy.
整个事件的症结就是因为他妒忌。
来自《权威词典》
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He used his key to open the door.
他用钥匙开门。
来自《权威词典》
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Where is the key to the office?
办公室的钥匙在哪儿?
来自《权威词典》