氮源的英文：
nitrogen source

Most, if not all fungi can dispense with inorganic sources.
即使不是全部亦是大多数真菌可省去无机氮源。

Nitrogen narcosis (or nitrogen euphoria or raptures of the deep)：Effects of breathing nitrogen under increased pressure.
氮麻醉(亦称氮欣快或深水销魂):在压力增高的条件下吸入氮气所产生的生理效应。

Nitrogen as a plant nutrient is treated in a great number of publications.
人们对植物营养中的氮素研究已发表相当大量的报告。

Elemental nitrogen is a very unreactive and inert material.
元素氮是一个十分不活跃的惰性物质。

Cyanide can serve as precursor for the amide nitrogen of asparagine
氰化物可以作一个天门冬酰胺的酰胺氮前体。

There is plenty of nitrogen in the air but it cannot be absorbed directly by the plants.
空气中有大量的氮，但植物不能直接吸收。

They are trying to trace the source of the trouble.
他们正设法找出这件麻烦事的起因。

Where is the source of the Nile?
尼罗河发源于何处？

Is the water polluted at source?
河水是在源头受到污染的吗？

We understand that sourcing is not static.
我们明白采购不是一成不变的。

Religion is not the only source of division.
宗教问题并不是分裂的唯一来源。