childish ,childlike

childish孩子气的，指孩子不如人意的地方，如不懂事、幼稚、傻气等，带有贬义

childlike孩子般的，多指孩子讨人喜欢的方面，如天真、纯洁、真诚等

company ,firm

根据英美企业法，firm只是指partnership(合伙公司)或unincorporated business(非责任有限公司)，company则可指corporation(责任有限公司)。

complement,compliment

complement:v.(使)完成、补充、补足n.补充物

compliment v.n.表扬、赞美

comprehend understand

understand是深度和广度都超过comprehend的“理解”

You may comprehend every word in this passage,but you may not understand its overall meaning.

consistent ,persistent

consistent:adj.前后一致的，始终如一的

persistent:adj.坚持不懈的，锲而不舍的

constrain ,restrain

constrain:强迫、迫使

restrain:束缚、限制行动

记忆要诀：con-前缀一般都有“把。。。聚集/汇拢在一起”的意念，带有强制性的感觉，因此constrain是“强迫、迫使”re-前缀一般是指“向后的运动”

discreet.discrete,discretion

discreet /di’skrit,di’skri:t/:a.(of people or their behaviour)careful and polite,esp.in what one chooses (not)to say;showing good sense and judgement a discreet silence,opposite(反义词):indiscreet discrete /di’skrit,di’skri:t/a.(esp.tech or fml)seperate,discontinuous

discretion:n.(1)the quality of being discreet (2)the ability to decide

what is most suitable to be done (3)at someone’discretion:according to someone’s decision (4)years of discretion:the/an age when one is considered (5)discretion is the better part of valour:

advice 忠告air 空气ash 灰烬bee f牛肉

advices 消息airs 风度、神气ashes 骨灰beeves 食用牛，菜牛

blue 兰色brain 脑髓colour 颜色compass 罗盘