nitrogen

[化学] 氮英释nna gas that has no colour or smell, and that forms most of the Earth’s air. It is a chemical element: symbol N

1 ammonia nitrogen,氨氮；氨型氮，氨基氮

2 nitrogen content,含氮量；总氮量

3 total nitrogen,总氮，总氮量

4 nitrogen fertilizer,氮肥；氮肥肥料

5 liquid nitrogen,液氮

6 nitrogen oxide,氧化氮；氮的氧化物

7 nitrogen source,氮源；氮源物质

8 nitrogen fixation,[化]固氮作用

9 nitrate nitrogen,硝态氮；硝酸盐氮

10 urea nitrogen,尿素氮；脲氮

11 nitrogen metabolism,氮代谢

12 nitrogen concentration,氮浓度

13 amino nitrogen,[化]氨基氮

14 nitrogen dioxide,[化]二氧化氮

15 nitrogen supply,氮供应

16 nitrogen balance,[生化]氮平衡

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

18 nitrogen cycle,氮循环

19 nitrogen flow,氮化怜

20 nitrogen treatment,氮化处理

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

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

3 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？