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IELTS BNC: 1267 COCA: 1093
keynoun [ C ]uk/kiː/ us/kiː/

key noun [ C ] LOCK

A1 a piece of metal that has been cut into a special shape and is used for opening or closing a lock, starting a car engine, etc.钥匙

car/door keys车／门钥匙

More examples

She fumbled around in her handbag, looking for her key.

I heard someone turn a key in the lock.

Give me the car keys - you're in no fit state to drive.

She suddenly remembered (that) her keys were in her other bag.

Please hand in your keys at reception on your departure from the hotel.

key noun [ C ] PART

B2 any of the set of moving parts that you press with your fingers on a computer keyboard, or musical instrument to produce letters, numbers, symbols, or musical notes（计算机、打字机或乐器的）键

Examples

If you press this key, the computer screen will clear .

Press and hold down the control key while you press '9'.

Press the return key twice to leave a blank line.

Use this key to toggle between the two typefaces.

He ran his fingers over the piano keys.

key noun [ C ] MUSICAL NOTES

a set of musical notes based on one particular note调，主音

The song changes key halfway through.歌曲在中间部分调子变了。
the key of C minorC小调

key noun [ C ] SYMBOLS

a list of the symbols used in a map or book with explanations of what they mean（地图、书等的）符号说明，图例

key noun [ C ] ANSWERS

A2 a list of the answers to the questions in an exercise or test（练习或考试的）问题答案

See the key to test 3 on page 176.在176页可以找到测试三的答案。

Idiom(s)

the key to sth
keyadjectiveuk/kiː/ us/kiː/

B2 very important and having a lot of influence on other people or things极重要的，关键性的

She was a key figure in the international art world.她是国际艺术界的重要人物。
a key factor in tackling the problem解决问题的关键因素

More examples

I think there is one key fact that you have overlooked.

The key witness for the prosecution was offered police protection after she received death threats.

The control of inflation is a key component of the government's economic policy.

Delegation of responsibility is a key part of a manager's job.

The economy is regarded as the key factor which will determine the outcome of the general election.

keyverb [ T ]uk/kiː/ us/kiː/

to intentionally damage a car by scratching its paint using a key故意用钥匙刮花一辆车

Someone keyed his Porsche.有人挂花了他的保时捷。

Phrasal verb(s)

key sth in
key sth to sb/sth
IELTS BNC: 1267 COCA: 1093
key

noun¹

 1for a door門ADJECTIVE | ... OF KEYS | VERB + KEY | KEY + VERB | PREPOSITION | PHRASES ADJECTIVE➤master, skeleton萬能鑰匙▸➤duplicate, spare配的鑰匙；備用鑰匙▸➤apartment, car, door, house, ignition, room, etc.公寓鑰匙、車鑰匙、門鑰匙、房屋鑰匙、點火開關鑰匙、房間鑰匙等◇She hides a front door key in a flowerpot.她在花盆裏藏了一把前門鑰匙。... OF KEYS➤bunch, ring, set一串／一圈／一套鑰匙◇a large bunch of keys一大串鑰匙◇He fished a ring of keys out of his pocket.他從口袋裏摸出了一串鑰匙。◇a set of car keys一套汽車鑰匙VERB + KEY➤turn轉動鑰匙◇She turned the key in the lock.她轉動鎖孔中的鑰匙。➤insert, put in, slide into插入鑰匙◇I slid the key into the lock and went in.我把鑰匙插入鎖孔，打開門進去了。➤remove, take out拔出鑰匙▸➤use用鑰匙◇She must have used a key to get in.她一定是用鑰匙進來的。➤leave留下鑰匙◇She left a key with the neighbours / neighbors.她留了一把鑰匙在鄰居那裏。➤lock in把鑰匙鎖在裏面◇I'd accidentally locked the keys in my car.我意外地把鑰匙鎖在了車裏。KEY + VERB➤open, unlock用鑰匙打開／開鎖◇You need a key to open the garage.打開車庫要用鑰匙。➤lock用鑰匙鎖上▸➤turn鑰匙轉動◇They heard a key turn in the lock.他們聽到鑰匙在鎖孔中轉動的聲音。➤jangle, jingle鑰匙叮噹作響◇The sound of keys jangling caught her attention.鑰匙叮噹作響的聲音引起了她的注意。PREPOSITION➤with a/the key用鑰匙◇You have to close it with the key.得用鑰匙才能關上。➤key for開⋯的鑰匙◇Robbie didn't have a key for these doors.羅比沒有開這些門的鑰匙。➤key to⋯的鑰匙◇the key to the front door前門鑰匙PHRASES➤get a key cut (BrE) 配鑰匙◇I'll get another key cut so that you can have one.我再去配把鑰匙，這樣你就可以有一把了。
key

noun²

 2on a computer計算機ADJECTIVE | ... OF KEYS | VERB + KEY ADJECTIVE➤Alt, arrow, backspace, control, delete, enter, escape, function, return, shift, etc.替換鍵、箭頭鍵、退格鍵、控制鍵、刪除鍵、回車鍵、退出鍵、功能鍵、返回鍵、轉換鍵等▸➤hot (= a key that you can press to perform a set of operations quickly) , short-cut熱鍵；快捷鍵◇F1 is the short-cut key for calling up help.F1 是查看幫助信息的快捷鍵。... OF KEYS➤row一排鍵◇the top row of keys最上面的那排鍵VERB + KEY➤hit, hold down, press, punch, tap按鍵；按住鍵；輕敲鍵◇Hold down the Alt key while pressing the arrow keys.按箭頭鍵的同時按住替換鍵。➤release鬆開鍵  ➡ topic at computer
key

noun³

 3decisive factor關鍵VERB + KEY | PREPOSITION VERB + KEY➤have, hold是關鍵；起關鍵作用◇First-time voters could hold the key to the election result.第一次投票的人可能會對選舉結果起關鍵作用。PREPOSITION➤key to⋯的關鍵◇Language is the key to understanding those around you.語言是理解周圍人的關鍵。
key

noun⁴

 4in music音樂ADJECTIVE | VERB + KEY | KEY + VERB | KEY + NOUN | PREPOSITION | PHRASES ADJECTIVE➤major, minor大調；小調▸➤high, low高調；低調VERB + KEY➤change變調◇The piece changes key in the middle.這首曲子中間有一次變調。KEY + VERB➤change音調變換◇The key changes from C major to A minor.音調從 C 大調變為 A 小調。KEY + NOUN➤change音調變化➤signature調號PREPOSITION➤in a/the key以⋯調◇What key is it in?這個用什麼調？◇Can we try it in a lower key?我們能用低一點兒的調試試嗎？➤key of⋯調子◇the key of G majorG 大調的調子PHRASES➤a change of key變調
key

noun⁵

 5on a musical instrument樂器ADJECTIVE | VERB + KEY ADJECTIVE➤organ, piano, etc.風琴、鋼琴等琴鍵➤black, white黑鍵；白鍵VERB + KEY➤caress, stroke, touch撫摸／輕撫／觸摸琴鍵➤depress按壓琴鍵
IELTS BNC: 1267 COCA: 1093
key noun
⇨ button 1 (computer/piano keys) ⇨ note (the key of G) ⇨ solution (the key to success)key adj.
⇨ main
IELTS BNC: 1267 COCA: 1093
key
Keys and combinations: bunch, code, combination...
Important thing or detail: feature, priority, element...
Keys on the computer keyboard: Alt key, arrow key, backspace...
Parts of musical instruments: bellows, bow, bridge...
Notes in the musical scale: A, b, bass...
Types of list: a who's who of something, bibliography, blacklist...
Parts of books: acknowledgments, addendum, afterword...
Important: important, major, key...
To use a computer keyboard, mouse or screen: backspace, click, click...

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