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| English | Chinese |
| Clean Air Act | 美国清洁空气法案 |
| clean air area Areas where significant reductions in ozone forming pollutants have been achieved through industrial initiatives to control and/or prevent pollution, through implementation of transportation improvement plans, national efforts to reduce automobile tailpipe emissions and lower the volatility (evaporation rate) of gasoline | 空气洁净区 (通过控制工业的主动排放和/或防止污染，交通改善计划的实施，以及国家为了减少机动车辆废气排放量和降低汽油挥发性而做的努力而实现的污染物形成显著减少的清新空气地区。) |
| clean air car Vehicles that function without emitting pollutants in the atmosphere | 空气洁净车 (具有不向大气中排放污染物功能的车辆。) |
| clean air projector | 清洁空气规化【发起】人 |
| clean development mechanism | 无污染开发机制 |
| Clean Energy Research Institute | 美国迈阿密大学清洁能源研究所 |
| Clean Gulf Associates | 美国净化墨西哥海湾联合体 |
| clean natural gas vehicle | 清洁天然气车 |
| clean technology Industrial process which causes little or no pollution | 清洁技术 (几乎不引起污染或完全无污染的工业处理。) |
| cleaning up The process of bringing desert, marsh, sea coast or other waste or unproductive land into use or cultivation | 清理 (使用或者培养沼泽地带、沙漠、海岸或其他废弃或贫瘠的土地的过程。) |
| contract cleaner A commercial service provider, usually bound by a written agreement, responsible for the removal of dirt, litter or other unsightly materials from any property | 清洁公司 (一种商业服务提供者，通常签订协议并负责清除各种财产上的污垢、垃圾和其它不雅观的物质。) |
| dry cleaning To clean fabrics etc. with a solvent other than water | 干洗 (用溶剂而非用水来清洗纺织品。) |
| Environmental Clean up and Responsibilities Act | 美国环境净化与责任条例 |
| Federal Clean Air Act | 联邦清洁空气法案 |
| Oil Companies International Study Group for Conservation of Clean Air and Water | 石油公司保护净化空气和水资源国际研究组 |
| oil spill clean-up technology | 石油泄漏清除技术 |
| street cleaning The process of removing dirt, litter or other unsightly materials from city or town streets | 清洁街道 (从其他城市或城镇街道去除污垢，垃圾或不雅观材料的过程。) |