in case 假如，万一
in no case 决不
catch on 理解，明白
catch up with 追上，赶上
by chance 偶然，碰巧
take a chance 冒险一试
in charge of 负责，主管
take charge of 担任，负责
check in 办理登记手续
check out 结帐后离开
check upon 校对，检查
cheer up 使高兴，使振奋，高兴起来
around / round the clock 一齐，一致，共同
clear away 扫除，收拾
clear up 整理，收拾，清除，澄清
around /round the clock 昼夜不停地
come off 实现，成功，奏效
come on 请，来吧，发展
come out 出版，出现，显露，结局是
come round / around 来访，苏醒
come through 经历，脱险
come to 总计，达到
come true 实现，达到
come up 走近，发生
come up to 达到，符合
come up with 提出，提供
in common 共同，共有
keep company with 与……交往，与……结伴
compare … to / with 把……比作
by compare 比较起来
be concerned with 就……而言
be concerned with 关心
in conclusion 最后，总之