The production process of NO gas for synthesizing oxalate belongs to the field of chemical and environment protection technology.

一种合成草酸酯用的NO气体的生产方法，属于化工和环保的技术领域。

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The present invention relates to chemical and environment protection technology, and is especially gradient magnetic field process and apparatus for raising content of oxygen dissolved in water.

本发明公开了属于化工环保技术领域的一种通过梯度磁场提高水中溶解氧含量的方法及装置。

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The village encountered a new problem two decades later as the environment became heavily polluted by chemical plants and mine refineries built in 1990s.

20年后，这个村庄遇到了一个新的问题，因为20世纪90年代建成的化工厂和炼油厂严重污染了环境。

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These are things that must be taken in from the environment because your body cannot manufacture them and they promote specific chemical reactions in the body.

这些都是必须从外界摄取的物质,因为无法通过自身合成,它们能促进体内特定的化学反应

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

Mark Carpenter, research fellow at Cranfield University's Chemical Safety, Fuels and Environment Group, said that hydrocarbon fuels were "a very good way of storing energy" but that linking the process to renewable energy was the only way to make it tenable.

BBC: Petrol from air: Will it make a difference?

And for the first time, plants using the worst chemicals--substances such as mercury, labeled persistent bioaccumulative toxins--would be able to use the short form, so long as they use less than 500 pounds of that chemical and release none into the environment.

FORBES: Toxic Neighbors?

Reportedly, eight North Korean plants are now manufacturing chemical weapons and army units are being trained to fight in a chemical warfare environment.

CENTERFORSECURITYPOLICY: Center for Security Policy | Must History Repeat Itself? Congress Should Not Invite North Korean Aggression