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IELTS BNC: 1267 COCA: 1093
key
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noun [C] /kiː/
singularkey
pluralkeys
  1. 1
    a small piece of metal used for opening or locking a door or a container, or for starting the engine of a vehicle 钥匙

    I could hear someone turning the key in the lock. 我能听见有人用钥匙开锁的声音。

    a bunch of keys 一串钥匙

    house/car keys 房子/汽车钥匙

    key to :

    Where's the key to the back door? 后门的钥匙在哪儿？

     Synonyms and related words
    Keys and combinations: bunch, code, combination...
  2. 2
    [usually singular] the thing that will do most to help you to achieve something 关键；要诀
    key to :

    Proper planning is the key to success. 合适的计划是成功的关键。

    The key to our strength lies in our members. 我们实力的关键在于我们的成员。

     Synonyms and related words
    Important thing or detail: feature, priority, element...
  3. 3
    one of the parts that you press on a keyboard to make it produce letters, numbers etc （键盘的）键

    Highlight the file you want and press the RETURN key. 选取你要的文档，然后按“返回”键。

     Synonyms and related words
    Keys on the computer keyboard: Alt key, arrow key, backspace...
    1. a.
      one of the parts that you press on a musical instrument to make it produce sounds （乐器的）键

      piano keys 钢琴键

       Synonyms and related words
      Parts of musical instruments: bellows, bow, bridge...
  4. 4
    music a set of musical notes that are based on one particular note （音乐的）调，主音

    a major/minor key 大/小调

    in the key of D sharp 用升D调（的）

     Synonyms and related words
    Notes in the musical scale: A, b, bass...
  5. 5
    a list of signs and their meanings, for example a list of the signs that are used on a map, drawing etc （地图、图样等的）凡例，符号表
     Synonyms and related words
    Types of list: a who's who of something, bibliography, blacklist...
    1. a.
      a list of answers to the questions in a test or in a book （测试或书中问题的）题解，答案
       Synonyms and related words
      Parts of books: acknowledgments, addendum, afterword...
See also
key
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adjective [usually before noun] /kiː/
  1. very important 关键性的；非常重要的

    Foreign policy had been a key issue in the campaign. 外交政策曾是竞选活动中一个关键性的问题。

    This economic model has the following key features. 该经济模式有以下主要特点。

    South Africa lost two key players through injury. 由于受伤，南非队失去了两名主力队员。

    key to :

    Women farmers are key to China's economic development. 农村妇女对中国经济的发展至关重要。

     Synonyms and related words
    Important: important, major, key...
    Collocates: key
    Nouns frequently used with key
    ▪  element, factor, feature, figure, issue, point, role, word
key
verb [T] /kiː/
present tense
I/you/we/theykey
he/she/itkeys
present participlekeying
past tensekeyed
past participlekeyed

  1. key

    or

    key in

    to put information into a computer or other electronic machine using keys or a keyboard 键入，输入（信息）

    The data will need to be keyed immediately. 这些数据需要马上输入。

     Synonyms and related words
    To use a computer keyboard, mouse or screen: backspace, click, click...

phrasal verbs

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

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