释义：
keep one's fingers crossed 借助幸运
字面意义为双手合十，表示“祈祷幸运的降临”。至于渴望的具体内容要加在 on 后面，或者可以用 that。keep somebody ( something ) +ing ( pp ) 的句型。
例句：
I'll keep my fingers crossed ( for you ) !
我会为你祈福的！
I'm keeping my fingers crossed that he'll pass the exam.
我祈祷能通过考试。
I've got to go. I'll keep you posted, okay?
我得走了。我会告诉你最新的消息，好吗？
Keep me posted on how they are doing.
让我知道有关他们的最新消息。
对话：
A: Tomorrow I'm going to ask Amanda to marry me.
明天我要向阿曼达求婚。
B: I'll keep my fingers crossed for you.
我会为你祈福。
