So, the emission control plan for in-use motor vehicles must be implemented as soon as possible in our country.
因此，我国必须尽早实施在用车排放控制的计划。
参考来源 - 我国汽车排放污染的现状及控制对策Marine vessel is one of removable contaminated sources, establishment of law about its emission control is mentioned on schedule.
船舶作为一种可移动的污染源，其排放控制法规的制定已经被提到议事日程上来。
参考来源 - 基于GT·2,447,543篇论文数据，部分数据来源于NoteExpress
Emission control systems take longer to warm up and become fully operational in cold weather.
冷天时，排放控制系统需要花费较长时间预热，才能全效工作。
The emission control system is required by law to reduce the air pollution the engine could produce.
排放控制系统按法规要求来降低发动机可能产生的空气污染。
Emission control and chemical utilization of carbon dioxide has been a challenge for scientists all over the world.
二氧化碳排放控制和化学利用是全世界科学家面临的难题。
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