在国外有很多俚语可以应用在托福口语中，既生动又拉近距离，和小编一起来看看这些俚语怎么用吧!
Be in the air 将要发生的事
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.
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.
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.
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!
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.
In the balance 未知的，不可预测的
Said when the outcome of a situation is unknown or unpredictable
Example: His career as a pilot is in the balance, as his eyesight does not seem good enough.
Drive a hard bargain 极力讨价还价
To have the negotiating strength and skills to get the most advantageous price and conditions
Example: Amanda is negotiating the best price from the suppliers. She drives a hard bargain.
Ring a bell 看起来或听上去很熟悉
To look, sound or seem familiar
Example: That face rings a bell, where have I seen him before?
Tighten one's belt 节衣缩食
To cut down on spending because there is less income than before
Example: Now you are out of work, you’ll have to tighten your belt and give up buying new clothes and going out so often.
Kill two birds with one stone
To complete two tasks together, with less effort than doing them separately
Example: Since I’d gone to the store to buy some bread, I thought of killing two birds with one stone and invited Mr. Biggs to the party.
以上是美国常用俚语，可以在托福考试中使用哦~更多托福信息可以关注新航道托福频道。
