black and white=something which is extremely clear(黑白分明的；绝对的), He told her in black and white that she couldn't leave the house while he was out.

　　dos and don'ts=the rules (行为准则，须知，注意事项), There are various dos and don'ts about driving in the UK.

　　haves and have nots=people who are rich and those who are not (富人和穷人), In London you can find the haves and have nots of the population.

　　ins and outs=the details (细节，始末，详情), I don't know the ins and outs of the situation, so I can't really advise you.

　　kiss and tell=when someone sells a story of themselves and a famous person (泄漏秘密), The British tabloids are famous for publishing kiss and tell stories.

　　odds and ends=small pieces of various items (零碎东西，零星杂物), She made a stew with the odds and ends she found in the fridge.

　　P's and Q's=manners (such as please and thank you) (言行), Mind your P's and Q's when you visit them!

　　pros and cons=advantages and disadvantages (赞成和反对), There are a few pros and cons that we should consider before buying a new house.

　　rights and wrongs=all the good points and bad points of a situation (事情的真相、全部), Regardless of the rights and wrongs of company policy, you need to give a month's notice.

　　tried and tested=something which has been well tested (经过反复考验的), Using salt is a tried and tested way of getting red wine out of a carpet.

　　ups and downs=good and bad periods following one another in turn(盛衰，沉浮), They have a lot of ups and downs in their relationship.

　　back and forth=not to stay still, but to keep traveling between two places (来回地，反复地), I'm so glad I'm moving. I was getting sick of going back and forth every day. Now my fourney to work will be a lot quicker.

　　dribs and drabs=small unimportant amounts (点滴、少量), The marathon runners finished in dribs and drabs.

　　said and done=to have the final word on something (说到底，毕竟), When it's all said and done, the new reception area is going to be a credit to the company.

　　cat and mouse=doing something in the same way that a cat plays with a mouse (猫鼠游戏，欲擒故纵), The guerillas played a cat and mouse game with the much better-equipped army.

　　trial and error=to do something new by making experiments and occasionally falling (反复试验), The new computer system has been installed. But it's a bit trial and error at the moment - nobody really knows how to use it.

　　flesh and blood=your family(家人), I have to help him if I can - he's my flesh and blood.

down and out=someone who has no money at all who has to live on the street (贫困的，贫病交迫的), There are too many young down and outs in London.

　　by and large=generally (大体上，总的说来，一般的说), By and large, our customers prefer good service to low prices.

　　bring and buy=a fair where people try to raise money for a cause by bringing something that other people might want to buy (慈善救济性自由集市), I'm making a cake for the school's bring and buy next week.

　　hide and seek=a children's game where one child hides and the others try to find him / her (捉迷藏), omeone's been playing hide and seek with the TV remote control again.

　　to and fro=another way of saying " back and forth " (往返地，来回地), I'm exhausted - I've been going to and fro all week!

　　over and out=something you say to show you have come to the end of your message (通话完毕), The last thing they heard from the pilot was 'over and out'.

　　done and dusted=properly finished (完毕，了结), Well, that's this project done and dusted. We need a holiday now.

　　wine and dine=to entertain someone lavishly (以好酒好菜款待客人), He's well-known for winning and dining his business partners.

　　bread and butter=your main source of income, or the most important issue (维持生活所需的), Health and education are the bread and butter issues facing the UK government.

　　spick and span=( of a room, house, etc.) completely clean and tidy again (房间、屋子等打扫得干干净净的；整洁的), Her house is spick and span at all times

　　wheel and deal=to make deals in a skillful and perhaps dishonest way when buying and selling things (讨价还价，玩弄手段，投机取巧), If you need a new car, try speaking to John. He's a bit of a wheeler and dealer.