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1 Be in the air 将要发生的事情 The feeling or idea that something new is about to happen or is going to change. Example:From the arguments going on at the meeting, it seems that a change in policy is in the air. 2 Clear the air 消除误会 To settle a dispute and restore good relations Example:We had a meeting with the workers, and I think we’ve cleared the air now. 3 Cost an arm and a leg 极其昂贵 To be very expensive Example:I love that fur coat. However, I don’t think I’m going to buy it because it costs an arm and a leg. 4 A bad egg 缺乏道德的人 Somebody who has no moral principles and should be avoided Example:You mustn’t lend Tim money, he’s a bad egg. You’ll never see him or your money again! 5 In the Bag 稳操胜券 Said of an achievement which is secure Example:We have the deal in the bag. The client came in this morning to sign the agreement. | 
