1.used to 过去经常
例句:He used to stand in for the star.
他过去一直在给明星做替身。
2.pocket change 零钱
例句:What's more, far from making a dent in your wallet, dried cranberries cost mere pocket change -- just 50 cents a cup.
而且,它不会是你钱包的灾难,越橘干只要点零钱就够——大约50美分一杯。
3.a lot of 许多
例句:I will not burden you with a lot of questions.
我不会提许多问题来烦扰你的。
4.on the air 广播
例句:We would never use it on the air . You need to find a real news story.
我们从不播映这样的节目,你需要去打一个真正的新闻材料。