除祈祷好运之外，cross one's fingers还有一个意思指的是"撒一点无关紧要的小谎，希望不被发现"。
例：
I told Mom I didn't eat any cookies but I had my fingers crossed.
我告诉妈妈我没有吃饼干，但我还是交叉手指，祈祷好运不被发现。
6 Pull one's leg
pull 是"拉扯"，leg 是"腿"，但 pull one's leg 可不是扯后腿的意思，真正的意思是"逗别人，开别人玩笑的意思"。
tease or joke with someone, often by trying to convince them of something untrue
即：戏弄或取笑某人，通常是试图让他们相信一些不真实的事情。
例：
Quit pulling my leg, I know there isn't a Hollywood director calling me right now.
别开我玩笑了，我知道现在没有好莱坞导演给我打电话。
今天的内容就这些，最后让我们复习一下：
brainchild 脑力劳动的产物；智力结晶
in the nick of time 在关键时刻
get something off one's chest 一吐为快
twist someone's arm 强迫
cross one's fingers 祈祷好运
pull one's leg 开玩笑
