讲解文本：
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！
