Now that the gas is no longer being produced, scientists can more accurately gauge the action of hydroxyl upon methyl chloroform's atmospheric concentration.

既然再不会生成这种气体，那么，科学家们就能够更精确地测量在甲醇氯仿物的空气聚合反应中生成的氢化物水平。

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This occurs naturally by the action of certain soil bacteria on the nitrogen in atmosphere, and the conversion of atmospheric nitrogen to its oxides by lightning.

发生在自然界中，通过某些土壤中的细菌对大气中的氮的作用，和通过闪电将大气中的氮转化成氮的氧化物。

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To determine the environment action on the durability of coastal concrete structure, the effect of coastal atmospheric, geology and seawater environment on the coastal concrete structure was examined.

为探讨环境作用在沿海混凝土结构耐久性设计中的影响程度，对沿海混凝土结构受到的海洋大气、沿海地质以及海水环境的作用进行分析。

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"It was a courageous move for Ford to open the door to its critics, " says Jennifer Krill of Rainforest Action Network, which does all it can to publicize the contribution of SUVs to atmospheric carbon.

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