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！
