Then anaerobic bacteria take that nitrate and turn it into harmless nitrogen gas.

最后厌氧菌将硝酸盐转化成无害的气体氮。

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Even nitrogen, which is a gas in its elemental state, is normally absorbed from the soil as nitrate ions.

即使是元素状态为气体的氮，也通常作为硝酸根离子从土壤中被吸收。

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Some phytoplankton can fix nitrogen and can grow in areas where nitrate concentrations are low.

一些浮游植物可以通过固氮在硝酸盐含量较低的地区生长。

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One of the worst disasters in U.S. history involving a form of ammonia occurred in April 1947 when a ship loaded with ammonium nitrate -- a solid fertlizer composed of ammonia and nitrogen -- caught fire while docked in Texas City, Texas, in April 1947.

CNN: What is anhydrous ammonia?