nitrogen

1. [U]〈化〉氮 a gas that is a simple substance, without color or smell, that forms most of the Earth's air

• colorless nitrogen无色气体

• nitrogen dioxide二氧化氮
• nitrogen fixation固氮法
• nitrogen oxide氧化氮

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

1. Air consists chiefly of nitrogen.
   空气主要由氮气组成。
2. The lamp is full of gaseous nitrogen.
   灯里充满了气体氮。
3. Nitrogen is a gas without colour or smell.
   氮是一种无色无臭的气体。
4. Nitrogen forms most of the Earth's air.
   地球上空气的大部分成分是氮气。
5. If it were not for oxygen and nitrogen in the air, no man could live on the earth.
   大气中如果没有氧和氮，人就无法生存于地球了。