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一、你知道key有幾種含義嗎？

adj.

最重要的；關(guān)鍵的

He is expected to be the key witness at the trial.

他將成為審判的關(guān)鍵證人。

n.

1.鑰匙 [C]

Leave him this key before you go.

你走之前把這把鑰匙交給他。

2.圖例，題解 [C]

This book is the key for use of students only.

這本書是專供學(xué)生用的題解。

3.（解決問題的）線索，秘訣，答案 [C]

The detective believes the missing gun is the key to the mystery.

那偵探認(rèn)為那把丟失的槍是偵破這宗疑案的線索。

4.（鋼琴，打字機(jī)等的）按鍵 [C]

As long as no key is pressed, the scanning goes around in a circular manner.

只要沒有按下鍵，掃描就循環(huán)地進(jìn)行。

5.【音】調(diào) [C]

The song is written in the key of D.

這首歌是用D調(diào)譜寫的。

v.

1.【音】為…調(diào)音 [T]

The musicians keyed their instruments just before the concert began.

樂師們在音樂會快開始前為樂器調(diào)了音。

2.用鍵盤輸入（信息等）(+in/into) [T]

The data-entry clerk who fails to key in something as important as an invoice amount creates a real problem.

如果數(shù)據(jù)錄入人員錯誤地輸入發(fā)票內(nèi)容，或者是數(shù)量，這就是很嚴(yán)重的問題。

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二、下面我們來學(xué)習(xí)一下含有key的常見短語

command key

n.[計]命令鍵

key ring

n. 鑰匙圈

key word

n.[計]關(guān)鍵字,保留字

master key

n. 萬能鑰匙

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三，你掌握key的用法了嗎？一起來做個小測試吧！