set against
1.balance against sth.用(某物)抵消
Certain business losses can be set against taxes.有些经营损失可以用来抵税。
2.oppose sth.firmly 坚决反对
Mary's father was set against the marriage from the beginning.玛丽的父亲从一开始就坚决反对这桩婚事。
All those who set themselves against the people will come to no good end.一切与人民为敌的人,都没有好下场。