语言点：
1.under the weather/down in the dumps可以表达心情不太好，可以这么用：
Shit happens,it's ok to be under the weather for a day,just learn to live with it.
2.from rags to richs/from zero to hero 白手起家/逆袭成功
例句：From zero to hero,Jack Ma built his empire.
3.hide作名词也有动物皮毛的意思，有个习语是have/tan sb's hide就是我们常说的扒了某人的皮，引申为严惩某人。
4.一经推出就一炮走红 run away success有没想到这么成功的意味。
例句：The product has been a runaway sales success.
5.through and through 彻彻底底/从头到脚
例句：He knows me through and through.
6.free lunch 免费午餐
想表达天底下没有免费的午餐可以这样说：There's no such thing as a free lunch.
7.heart of gold 金子般的心
8.if和but作名词也很好用，表达不确定以及强调转折。
例句：
-Are you going to leaving the city after graduate？
-Oh,that's a big if.
9.shoulder responsibility/cost/blame承担责任/费用/过失
例句：The residents are being asked to shoulder the costs of the repairs.
10.关于数字的几个表达
天文数字：astronomical number
bajillion：特别多的，A number far greater than the normal amount; a concept, like infinity, rather than a number.
例句：You've said that like a bajillion times already!
I've got a bajillion work to do.
a dime a dozen 白菜价,The phrase a dime a dozen refers to something very plentiful, common, and therefore, inexpensive.
例句：Books like this are a dime a dozen.
11.go downhill/south 走下坡路
12.grandfather on my mother/father's side 姥爷/爷爷
