1. C 钥匙　 metal instrument shaped so that it will move the bolt of a lock
2. C 关键，要诀　 thing that provides access, control or understanding
3. C 键　 any of the set of levers that are pressed by the fingers to operate a typewriter, piano, etc.
4. C （乐曲的）调；口吻，基调　 set of related notes, based on a particular note, and forming the basis of a piece of music; general tone or style of sth
5. C 题解，答案　 set of answers to exercise or problems
6. C 图例，略语表　 explanation of the symbols used in a coded message or on a map, diagram, etc.

　break the ～　把钥匙弄断了
　cut a ～　配一把钥匙
　fit a ～　配一把钥匙
　introduce the ～ into the lock　把钥匙插入锁内
　keep a ～　拿着一把钥匙
　lose a ～　丢失一把钥匙
　make a ～　做一把钥匙
　pocket a ～　把钥匙放进兜里
　put the ～ in the lock　把钥匙插入锁内
　put the ～ under the door　闭户而去
　turn the ～　转动钥匙
　use the ～　用钥匙
　afford the ～　提供线索
　discover the ～ to　发现…的线索
　find a ～　找到答案
　have the ～　有了办法
　hold the ～s of〔to〕　掌握，控制，支配…
　offer the ～　提供线索
　pound the ～s　弹键
　press a ～　按键
　strike a ～　按键
　tap the ～s　弹键
　play in the ～ of C　用C调演奏
　dead ～　死键
　golden ～　金钥匙
　high ～　高音调
　low ～　低音调
　major ～　大调
　master ～　万能钥匙
　right ～　正确答案
　soft ～　软键
　～ factor　重要因素
　～ figure　关键人物
　～ industry　基本工业
　～ issue　关键问题
　～ man　关键人物
　～ position　重要位置
　～ post　重要职位
　～ role　关键性作用
　～ speech　重要发言
　～ university　重点大学
　in a ～　用某一个调
　in the ～ of　用…调演奏
　in the same ～　单调地，千篇一律地
　off ～　不合调，走调
　under lock and ～　严密监禁
　～ for the use of teachers　供教师用的题解
　～ in the lock　插在锁头里的钥匙
　～ of　开…的钥匙
　～ of C major C　大调
　～ of the door　开门的钥匙
　～ of the lock　开锁的钥匙
　～ of the position　要害地点
　～ of the room　开房间的钥匙
　～ to　开…的钥匙
　～ to an understanding of the situation　了解形势的线索
　～ to good health　健康的诀窍
　～ to success　成功的秘诀
　～ to the difficulty　解决困难的办法
　～ to the door　开门的钥匙
　～ to the lock　开锁的钥匙
　～ to the room　开房间的钥匙
　～ to the secret　秘密的线索

　This lock has a special key.　这个锁有把特别的钥匙。
　This bunch of keys is yours.　这串钥匙是你的。
　He cried that he had found the key.　他大声叫喊找到了钥匙。
　I spent ten minutes searching through the drawer for the key, and it was in my bag all the time!　我花了十分钟翻遍抽屉找钥匙，原来钥匙一直在我包里。
　He left his keys in his bed.　他把钥匙遗忘在床上了。
　I didn't miss the key until I got home and found it wasn't in my bag.　直到我回到家想从包里拿钥匙时，才发现它不见了。
　Where is the key to the office?　办公室的钥匙在哪儿?
　I lost the key to the door.　我把门钥匙丢了。
　Have you got the key to this door?　你有这个门的钥匙吗?
　He used his key to open the door.　他用钥匙开门。
　Transport has always been the master key of trade.　运输一向是贸易的关键。
　The key to the whole affair was his jealousy.　整个事件的症结就是因为他妒忌。
　Education becomes the key to progress.　教育成为进步的关键。
　Diligence is the key to success.　勤奋是成功的秘诀。
　Diet and exercise are the key to good health.　吃规定食物和锻炼是身体健康的关键。
　The key to good health is to eat and sleep regularly.　保持身体健康的秘诀是饮食和睡眠要有规律。
　Gibraltar is the key to the Mediterranean.　直布罗陀是地中海的要害。
　Her fingers touched the keys of the typewriter speedily and accurately.　她的手指迅速而准确地触动打字机的键。
　A key is the part of a piano that you touch to make music.　琴键是钢琴上用手指敲击的部件，它能使钢琴发出乐音。
　Piano keys are either black or white.　钢琴键不是黑色的就是白色的。
　The instruments were tuned to the key of E.　乐器都调为E调。
　The letter was written in an angry key.　这封信是用愤怒的口吻写成的。
　Her speech was all in the same key.　她的演说自始至终是一个基调。
　I don't know the key to the puzzle.　我不知道这个谜语的谜底。
　He is a key man.　他是个重要人物。
　Beijing University is one of the key universities in China.　北京大学是中国的一所重点大学。

 ♣ get〔have〕 the key to the door
　到达法定年龄　reach the age of majority
　Will you come to my party next Saturday?I'm getting the key to the door.　我就到了法定年龄了，下个星期六，你来参加我的成年人聚会，好吗?
 ♣ key to a problem
　解决问题的办法　aspect of a problem that, if dealt with, leads to a solution
　The country desperately needs more houses, and the key to the problem, as usual, is money.　国家极想建造更多的住房，但通常碰到的问题是钱。

 ♣ key of, key to
　key　的后置定语可由of引起，也可由to引起，其区别是：
1. 作“钥匙”解时， of后接“房间，建筑物”等， to后接“门，锁”等
2. 作“关键”解时， of后接一般事物， to后接“成功”等结果名词

1. vt.用键盘输入　 type in (data) using a keyboard
2. vt.调音　 tighten or loosen the strings of a musical instrument so that the right notes are produced
3. vt.使某事物与他事物相似〔相适应　〕 make sth similar to sth else; make sth suitable for sth else

　～ one's mood　使某人的情绪适合
　～ the factories　使工厂适合
　～ the programme　使这个节目适合
　～ this sentence　输入这个句子
　～ to the needs　适合需要

　I have keyed this sentence three times, and it's still wrong!　我把这个句子输入了三次，可是仍然不对。
　The company keyed its factories to produce more goods.　该公司使他的各工厂能够生产更多的货物。
　The concert was a failure because the instruments were wrongly keyed.　那场音乐会失败了，因为乐器定错调了。

 ♣ key to　(v.+prep.)
　使…与…一致〔适合〕　make sth accord with sth
　They tried to key the programme to a younger audience.　他们努力使这个节目适合比较年轻的观众。
　The farm was keyed to the needs of the local people.　农场按当地人的需要作了调整。
　Their new factories are keyed to produce the things that their army needs.　他们把新工厂设计成适合军工生产的地方。
 ♣ key up　(v.+adv.)
1. 升高或调整（乐器的）音调 tighten or loosen the strings of a musical instrument so that the right notes are produced
　This piano wants keying up.　这架钢琴需要调音。
　They keyed a piano up to concert pitch.　他们把钢琴的音调升高到音乐会的高音标准。
2. 使某人激动或紧张 make sb excited, nervous or tense
　The thought of the coming expedition to Tibet keyed them up to a high pitch of excitement.　一想到即将去西藏考察，他们都感到极度兴奋。
　The coach keyed up the team for the big game.　教练鼓励队员以备大赛。
　The crowd was keyed up for the football match.　群众为这场球赛而欢欣。
　I was keyed up about the examination.　我因考试而紧张。
　The manager warned us not to get too keyed up before the big match.　领队告诫我们在大赛之前不要太激动。

　［同义词］ n. answer, clue, code, explanation, guide, index, interpretation, lead, means, sign, solution