1.sleep on itTo ‘sleep on it’ is to delay making a decision, usually to give you more time to think about it with a clear mind. 当你需要更多的时间去做一个更好的决定时，你就可以说「sleep on it」Example: ‘I can’t decide now, I will sleep on it and let them know my answer tomorrow.’2.at the drop of the hatIf you do something ‘at the drop of the hat’ then you do it very quickly, without hesitation.迅速地做某件事，没有任何迟疑。Example:‘He always helps me at the drop of the hat, he is such a good friend.’3.back to the drawing boardIf you go ‘back to the drawing board’ then you go back and start something again.意指某件事回到原点，从头开始。Example: ‘They won’t accept our proposal, so it’s back to the drawing board for now.’ 4.add insult to injuryTo ‘add insult to injury’ is to make a bad situation even worse. 将本来就糟糕的情况变得更坏了。Example: ‘We lost the game and to add insult to injury, my leg looks like it is broken.5.a cinchIf something is ‘a cinch’ then it is simple or easy.某件事异常简单，小菜一碟，就可以说 its a cinch.Example: ‘I can climb that rock wall, it’s a cinch.’结尾音乐：Cam - 《Burning house》