as cool as cucumber 镇定，镇定自若
as hungry as a lion 渴望得到
as sharp as a spear 聪明睿智
black is white and white is black 黑白颠倒
cast-iron nerves 坚强的意志
as sly as a fox 诡计多端
eat like a bird 吃得少，饭量小，胃口小
as quite as a mouse 静若处子，寡言少语，不声不响，非常安静
as busy as a bee 和蜜蜂一样忙碌
a piece of cake 小菜一碟
child's play 小孩的把戏，很容易去做
off the top of one's head 未经思考地，脱口而出地
on paper 理论上
do one's homework 对...了如指掌
as easy as pie 轻而易举，十分容易
as plain as day 一清二楚，显而易见
be raining cats and dogs 倾盆大雨，大雨滂沱
one's cup of tea喜欢或合乎某人的喜好或口味
an arm and a leg 昂贵的代价
hold firm 坚信，坚持
on its last legs 将要崩溃或濒临死亡
senior citizens 年老的人或老人
physically challenged 身体有残疾的人
visually challenged 人视力不好
not all there 不太正常，神志不清，呆头呆脑
sanitary worker 保洁，清洁工
the man in the street普通工薪阶层的人
between jobs 失业
wash one's hands 上厕所
body count 在某一现场发现的死亡人数
correctional facility监狱
capital punishment= death penalty 死刑
negative profits 损失
pre-owned = second-handed/used 二手的，旧的
person of interest 有利害关系的人
golden years 退休时期
be economical with the truth 有所隐瞒
a confidential source 提供情报者，线人
in black and white 报纸黑字
egghead = a very clever person 一个非常聪明的人
rain or shine = na matter what difficulties we face 风雨无阻
wet behind the ears = lacking experience 缺乏经验
call it a day 今天到此结束，收工
bite off more than he could chew - take on more than he could handle
所承担的已超出他的能力范围
keep one's finger crossed 祈求好结果
couch potato - a person who spends too much time watching TV 沙发土豆give sb. a hand = do sb. a favor 帮助某人。