pin /pɪn/► SEE ALLpin your faith/hopes on sb/sthpin money(as) clean as a whistleyou could have heard a pin drop ●ˌpin your ˈfaith/ˈhopes on sb/sthput your trust in sb/sth; hope for sb/sth寄希望于；指望◆He’s pinning his faith on the revival of the economy. 他寄希望于经济复苏。◆The idea that he’ll be out of prison in five years is all she’s got to pin her hopes on. 她只能指望他能在五年后出狱。●ˈpin money (informal) a small amount of money that you earn, especially when this is used to buy things that you want rather than things that you need零花钱；外快◆She teaches a little French now and then, just for pin money. 她偶尔教点法语，只是为了挣点零花钱。ORIGINThis was originally the money given to a woman by her husband to pay for her clothes and other personal items.这个习语原指丈夫给妻子购置衣服或其他个人用品的一笔钱。●(as) clean as a ˈwhistle (informal) 1. ( (as) clean as a new ˈpin) very clean干干净净◆She scrubbed the kitchen floor until it was clean as a whistle.她把厨房的地板擦得干干净净。2.if sb is as clean as a whistle, they are not involved in anything illegal清白无罪◆I don’t know why the police want to talk to me. I’m as clean as a whistle!我不知道为什么警方找我谈话，我可是清清白白的！●you could have heard a ˈpin dropit was extremely quiet静得能听见针掉在地上的声音；鸦雀无声◆When the play finished you could have heard a pin drop.戏收场时，全场鸦雀无声。