有毒物 deleterious agent; poison material; poisonous substance; toxic substance; toxicant 钆毒物 gadolinium poison .
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有害物
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deleterious agent
有害的代理
以上为机器翻译结果，长、整句建议使用 人工翻译 。
Pollution caused by discharge of motor tail - gas has become the biggest polluting source in cities. Improving the quality of fuel can effectively control the deleterious agent discharged by motors.
汽车尾气排放污染已居城市污染源之首，提高燃油质量可有效控制汽车有害物排放。
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