at bottom

实际上, 本质上, 根本上

例句与用法：

At bottom, the question is confidence: confidence in the economy and confidence in our political leadership.

基本上，问题在于信心：对经济的信心以及对政治领导的信心。

详细释义：

实际上

He pretends to be very hard, but he's a kind man at bottom.

他假装无情, 实际上却是一个善良的人。