They interceded with the authorities on behalf of the detainees.他们为被拘留者向当局求情。He gave witness on behalf of an accused person.他为被告作证.She gave witness on behalf of the accused person.她替被告作证....
Some of the prints were badly discoloured.有些图片褪色严重。Spilt acid discoloured the floor.泼出的酸弄得地板褪色.Sunlight had discoloured the bright red curtain.日照使这朱红(色的)窗帘褪了色....