condense表示缩短时，对象是story, passage，condense the long story to a short story
contract表示缩短时，对象主要是word， we contract words ‘are not’to form ‘aren't’
out of condition健康不佳
confess to doing
in confidence私下地，秘密地
take into one's confidence 把……作为知己
comform遵守，符合，+to you should conform to the usages of society。
comply with 遵守，
confront with 面对
congratulate him on/upon his promotion 祝贺他升迁
celebrate his birthday with a party
in conjunction with与……共同，连同
in connection with关于，与……有关
lose one's connection to a place（转车误点）没赶上转乘去……的班车
in （all/good） conscience凭良心，公平地
on one's conscience 引起某人悔恨（或内疚）的
have a good conscience 问心无愧
have a bad（guilty） conscience感到内疚
have no conscience没有良心
be conscious of意识到
conscious，表示内心所意识到的感觉，aware指感觉上的知觉
one may be conscious of fear，but not altogether aware of the danger which is going on about one
be common consent经一致同意
meet the needs of the people must accept the consequences常指随……而产生的后果
in consequence因此结果，in consequence of由于，因为……的缘故
conservative
considerable表数量和程度
significant 有意义的，（意义）重大的
enormous（huge）巨大的，（immense）庞大的（强调外型、体积）
numerous（指数量）很多的，无数的
in consideration of 考虑到，由于，作为对……的酬报
take into consideration 考虑到，顾及
consist of由……组成
consist in在于
consist with 与……一致
in constant change总是在不断地变化，
under construction （正在修建
consume on sth，in doing sth
come into contact with与……接触，联系
contemporary
he is contented with his small salary
satisfy 表示使人的要求、希望得到完全的满足，若只表示使人在一定程度上感到满足，则用content
continuous 持续地，强调连续不断地，continual 断断续续地，频繁地
contradiction 矛盾
in contradiction with 与……矛盾
on the contrary 正相反，to the contrary 相反地，
by/in contrast 对比之下
in contrast to /with与……对比起来，与……形成对比
devote ，dedicate one's life，oneself，
contribute to doing
make contribution（s） to （doing） sth，对……作出贡献
controversial 引起争议的，有争议的
convenience 不能由人做主语，
convert 表示改变某人的政治观点，信仰。
to convict sb. of a crime 判决某人犯有……罪
convince sb of sth，that，使某人相信
cook up
cool down/off 冷却，冷静下来
to the core 十足的，透顶的
around/round the corner临近，在附近，draw near
cut corners走捷径，省钱（或人力，时间等）
turn the corner 出现转机
correspond to 相当于
correspond with 与……通信，相符合，相……一致
in correspondence with
at all cost
the state council
keep one's own counsel将意见（或计划）保密
cover for代替，为……打掩护
cover up 掩盖，掩饰
take cover 隐蔽
under cover 秘密地，暗地里
crack down 对……采取严厉措施，镇压
crack up（精神）崩溃