Hermetic performance should be assured and leaking phenomena should not appear, especially for flammable and explosive gas medium, as well as poisonous and deleterious mediums.

保证密封性，不应有泄漏现象出现，尤其是易燃易爆气体介质和有毒有害介质。

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Yellow phosphorous tail gas contains large Numbers of co and some of deleterious impurities,. Co is the basic material of one carbon chemistry engineering.

黄磷尾气中含有大量的CO及一些有害杂质，其中CO是碳一化工的基本原料。

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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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If lawmakers continue to pursue such deleterious oil and gas policies, investors will shift their capital investments from U.S.-based companies to our competitors overseas where abundant and affordable energy opportunities persist.

FORBES: BP Full Of Fault For Gulf Spill But Obama Guilty Of Propagating Economic Disaster