key
[ADJ, NOUN]
1. 关键的
The key person or thing in a group is the most important one.
反义词
双语例句
例：He is expected to be the key witness at the trial.
预计他将成为审判时的关键证人。
例：Education is likely to be a key issue in the next election.
教育很可能是下次选举的关键议题。
例：an area of the brain that plays a key role in voluntary movement.
在随意运动方面起关键作用的一个大脑区域。
ADJ. 形容词
keys
1. [C 可数名词] 钥匙
A key is a specially shaped piece of metal that you place in a lock and turn in order to open or lock a door, or to start or stop the engine of a vehicle.
双语例句
例：They put the key in the door and entered.
他们用钥匙开了门然后走了进去。
2. [C 可数名词] （计算机或打字机的）键
The keys on a computer keyboard or typewriter are the buttons that you press in order to operate it.
双语例句
例：Finally, press the Delete key.
最后，按删除键。
3. [C 可数名词] 琴键
The keys of a piano or organ are the long narrow pieces of wood or plastic that you press in order to play it.
双语例句
例：the black and white keys on a piano keyboard.
一个钢琴键盘上的黑白琴键。
4. [C, U 有变体名词] （音乐的）调
In music, a key is a scale of musical notes that starts on one specific note.
双语例句
例：the key of A minor.
A小调。
5. [C 可数名词] 图例
The key on a map or diagram or in a technical book is a list of the symbols or abbreviations used and their meanings.
近义词
双语例句
例：You will find a key at the front of the book.
你在书的前面会看到一个图例。
6. [C 可数名词] 关键
The key to a desirable situation or result is the way in which it can be achieved.
双语例句
例：The key to success is to be ready from the start.
成功的关键是从一开始就做好准备。
NOUN. 名词
keys , keying , keyed
key in
1. [PHRASAL 短语] 键入
If you key something in, you put information into a computer or you give the computer a particular instruction by typing the information or instruction on the keyboard.
近义词
type in
双语例句
例：Brian keyed in his personal code.
布赖恩键入了他的个人密码。
PHRASAL VERB. 短语动词
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