讲解文本：

cannot put one's finger on 搞不懂，毫无头绪，一头雾水

Mike cannot put his finger on his girlfriend’s emotions.

Mike完全搞不懂她女朋友的情绪。

I still cannot put my finger on who wrote me that card

我还是不能确定那张贺年卡是谁寄来的。

疯狂练习吧!