He has exacted a written apology from the chairman.他要求主席作出书面道歉。

He had exacted a promise from Nixon before coming on board.上飞机前他要求尼克松给他一个承诺。

the extent to which a prudent ruler might exact obedience from his subjects精明的统治者可能会要求子民臣服的程度

institutions that exact discipline from their members要求成员遵守纪律的机构