大学英语：重要词汇by chance(=accidentally，by accident)偶然

102.for a change 换换环境(花样等)

103.charge sb. with… 控告某人犯有…

104.in charge of(=responsible for)负责(某事);in the charge of… 由…管

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

106.charge…for 因…索取(费用);charge sb. with sth. 控告某人犯有…

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

108.comment on 评论

109.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

110.in common(和…)有共同之处，共用;Be common to sb. 是与某人所共有的

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