on pins and needles 坐立不安，如坐针毡

　　I am going to be on pins and needles until I get that phone call from her.

　　在她给我打电话之前，我肯定要一直坐立不安了。

　　He tried to look calm but everybody knew he was on pins and needles.

　　他想装得很平静，但每个人都知道他很紧张。

　　疯狂练习吧！