n. a common nonmetallic element that is normally a colorless odorless tasteless inert diatomic gas; constitutes 78 percent of the atmosphere by volume; a constituent of all living tissues
n. 氮
[化] 氮N-2
1. Nitrogen is an essential element for plant growth.
氮是植物生长所必需的元素。
2. The atmosphere is made up of about 78% nitrogen.
大气中约有78%的氮。
3. Nitrogen gas is used in the food industry to preserve freshness.
氮气在食品工业中用于保持新鲜。