nitrogen

Well, we know nitrogen has what?.对于氮气我们知道什么？

The plant requires nitrogen in order to make proteins..植物需要氮以便制造蛋白质。

All of these from the group one and two through the group five and six elements, but what about elements, what about molecules like hydrogen, or nitrogen, or maybe oxygen?.所有的这些都是来自于第一主族和第二组主族,到第五主族和第六组主族的悬殊，那么元素呢，比如氢气，氮气或氧气那样的分子呢？

ammonia nitrogen,氨氮；氨型氮，氨基氮

nitrogen content,含氮量；总氮量

total nitrogen,总氮，总氮量

nitrogen fertilizer,氮肥；氮肥肥料

liquid nitrogen,液氮

nitrogen oxide,氧化氮；氮的氧化物

nitrogen source,氮源；氮源物质

nitrogen fixation,[化]固氮作用

nitrate nitrogen,硝态氮；硝酸盐氮

urea nitrogen,尿素氮；脲氮

nitrogen metabolism,氮代谢

nitrogen concentration,氮浓度

amino nitrogen,[化]氨基氮

nitrogen dioxide,[化]二氧化氮

nitrogen supply,氮供应

nitrogen balance,[生化]氮平衡

biological nitrogen fixation,生物固氮；生物固氮酌；生物固氮作用

nitrogen cycle,氮循环

nitrogen flow,氮化怜

nitrogen treatment,氮化处理