(dirtier, dirtiest) unpleasant or dishonest不愉快的；不诚实的◆dirty fighting in the boardroom董事会会议上的明争暗斗◆Small airlines have accused the national carrier of using dirty tricks to steal their customers.小航空公司谴责国有航空公司采用卑劣手段夺走它们的顾客。causing pollution ; containing substances that may be harmful导致污染的；肮脏的◆Energy production today relies on dirty fuels, such as coal, oil and gas.当今的能源生产依赖如煤、石油和天然气等容易导致污染的燃料。OPPclean ●(do sb's) ˈdirty work(to do) the unpleasant or dishonest jobs that sb else does not want to do（从事）没人愿干的事；卑鄙勾当◆They hired an external consultant to do the dirty work of firing people.他们从外面雇了一个顾问来干解雇员工的脏活。●ˌquick and ˈdirty () quick and dirty methods or systems provide fast, simple solutions to problems but may not last or be effective for a long time迅速而又简单的；临时应急的