n. 合唱;合唱队;(歌曲的)副歌;合唱歌(曲);
vt. 合唱;齐声背诵;异口同声地说;
[例句]Caroline sang two verses and the chorus of her song.
卡罗琳唱了她歌曲中的两段和副歌部分。
2. chronic
adj. 慢性的;长期的;习惯性的;
[例句]Anyone who does not believe that smoking is an addiction has never been a chronic smoker.
不相信抽烟能上瘾的人肯定不是老烟民。
3. clarity
n. 清晰度;明确;透明;清楚，明晰;
[例句]In business circles he is noted for his flair and clarity of vision.
在商界，他的天赋和远见卓识是出了名的。
4. cling
vi. 坚持;附着于，紧贴;抓紧或抱住;沿(岸)前进，贴着(墙)走;
vt. 依恋，依附于;
[例句]Another man was rescued as he clung to the riverbank.
另外一个人因为紧紧攀住河堤而获救。
5. clumsy
adj. 笨拙的;复杂难懂的;得罪人的;(文体等)臃肿的;
[例句]I'd never seen a clumsier, less coordinated boxer.
我从没见过更笨拙、动作更不协调的拳击手。
6. cluster
n. 群;丛;簇，串;[语言] 辅音群;
vi. 丛生;群聚;使密集，使聚集;
[例句]There's no town here, just a cluster of shops, cabins and motels at the side of the highway.
这儿没有城镇，只在公路边上有一片商店、小木屋和汽车旅馆。
7. clutch
vt. 抓住;抓紧;紧握;抓取;
vi. 试图抓住;踩离合器;
adj. 紧要关头的;没有手提带的;
[例句]I staggered and had to clutch at a chair for support.
我踉踉跄跄地，不得不抓住一把椅子稳住自己。
8. coherent
adj. 连贯的;一致的;条理分明的;清楚明白的;
[例句]He has failed to work out a coherent strategy for modernising the service.
他未能制定出一条连贯的策略来实现服务的现代化。
9. coin
n. 硬币;金属钱币;[建筑]拐角，墙角石;
vt. 制造硬币;杜撰;创造;
[例句]Jaron Lanier coined the term 'virtual reality' and pioneered its early development.
杰伦·拉尼尔创造了“虚拟现实”这个词，并成为推动其早期发展的先驱人物。
10. coincide
vi. 相符;与…一致;想法、意见等相同;极为类似;
[例句]The kids 'views on life don't always coincide, but they're not afraid of voicing their opinions.
孩子们的人生观并不总是一致，但他们敢于表达自己的观点。
11. collaborate
vi. 合作，协作;(国家间的)协调，提携;勾结，通敌;
[例句]He collaborated with his son Michael on the English translation of a text on food production.
他和儿子迈克尔合作，把一篇介绍食品生产的文章译成了英文。
12. collapse
vi. 崩溃;倒塌;折叠;(尤指工作劳累后)坐下;
vt. 使倒塌;使坍塌;使瓦解;
n. 垮台;(身体的)衰弱;
[例句]A section of the Bay Bridge had collapsed.
海湾大桥有一段垮塌了。
13. collide
vi. 碰撞;相撞;冲突;抵触;
[例句]Two trains collided head-on in north-eastern Germany early this morning.
今天早上德国东北部两列火车迎面相撞。
14. commemorate
vt. 纪念，庆祝;成为…的纪念;
[例句]One room contained a gallery of paintings commemorating great moments in baseball history.
有一个房间里陈列着很多纪念棒球史上伟大时刻的画作。
15. commend
vt. 推荐; 表扬; 托付; 受到赞同;
[例句]I commended her for that action.
我赞扬了她的那一举动。
