1.by chance (= accidentally, by accident) 偶然

　　2.for a change 换换环境(花样等)

　　3.charge sb. with ……控告某人犯有……

　　4.in charge of (=responsible for) 负责(某事)

　　in the charge of ……由……管

　　5.take charge of (=to be or become responsible for) 负责管理(照顾)

　　6. charge...for 因……索取(费用)

　　charge sb. with sth. 控告某人犯有……

　　7.round the clock (=all day and all night, usually without stopping) 昼夜不停地

　　8.comment on评论

　　9. commit oneself to 使自己承担…… commit sb. to prison 把某人送进监狱;commit one’s idea to writing 把某人的想法写下来;commit a matter to a committee 把某事交给委员会讨论

　　10.in common (和……)有共同之处，共用

　　be common to sb. 是与某人所共有的

　　11.keep company with (=be friendly and go out together) 和……要好

　　12.compare...with... 把……与……比较

　　13.compare...to... 把……比作……

　　14.by comparison 比较起来

　　15.in comparison with (=in contrast to) 和……比起来

　　16.compensate for (=give sth. to make up for) 补偿，赔偿，弥补 compensate sb. for sth. 赔偿，弥补

　　17. complain of (or about) 抱怨;诉苦;控告;complain about 抱怨某人或事情;complain to sb. about sth. (or sb.) 向某人抱怨……;complain(抱怨);complement(补充);compliment(恭维)

　　18.comply with (=act in accordance with a demand, order, rule etc.) 遵守，依从

　　19.conceive of (think of, imagine, consider) 想象，设想

　　20.concentrate on (or upon) 集中，专心