1
Nitrogen + be + [adjective/past participle]
Nitrogen is found in proteins.
氮存在于蛋白质中。
一种常见的非金属元素，是无色无臭无味的惰性气体，约占大气的78%，存在于所有生物组织中
先理解核心含义，再看它在真实句子里的用法。
一种常见的非金属元素，是无色无臭无味的惰性气体，约占大气的78%，存在于所有生物组织中
a common nonmetallic element that is a colorless, odorless, tasteless inert gas making up about 78% of the atmosphere and present in all living tissues
Nitrogen is found in proteins.
氮存在于蛋白质中。
化学元素(符号N),原子序数7,原子量14.0067。无色无味气体
The chemical element (symbol N) with an atomic number of 7 and atomic weight of 14.0067. It is a colorless and odorless gas.
一种常见的非金属元素,通常为无色无味无味的惰性双原子气体；占大气体积的78%；是所有生物组织的组成部分
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
分子氮(双原子氮),N2,室温下为无色无味气体,占空气的78%
Molecular nitrogen (diatomic nitrogen), N2, a colorless, odorless gas at room temperature, which constitutes most of air (78% of it).
化学式中的特定氮原子或氮的特定同位素
A specific nitrogen atom within a chemical formula, or a specific isotope of nitrogen.
Plants require nitrogen to produce proteins and grow properly.
植物需要氮来制造蛋白质并正常生长。
The industrial process uses liquid nitrogen to rapidly freeze food products.
该工业过程使用液氮快速冷冻食品。
Nitrogen makes up about 78 percent of Earth's atmosphere.
氮约占地球大气的78%。
Nitrogen is found in proteins.
氮存在于蛋白质中。
Fertilizers often contain nitrogen.
肥料通常含有氮。
常用在科学术语中。
Nitrogen fixation is performed by bacteria.
固氮作用由细菌完成。
表示含量高可用high in或rich in。
Leguminous plants are high in nitrogen.
豆科植物含氮量高。
Not this
Plants need nitrogens to grow.
Use this
Plants need nitrogen to grow.
氮(nitrogen)作为化学元素是不可数名词，不能加复数-s。改为单数形式即可。
Not this
The nitrogen is essential for life.
Use this
Nitrogen is essential for life.
当泛指氮这种元素时，一般不用定冠词the。去掉the，使用零冠词表示泛指。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
大气氮
Atmospheric nitrogen is converted into a usable form by certain bacteria.
大气氮通过某些细菌转化为可利用的形式。
液态氮
Liquid nitrogen is used in cryogenics and food preservation.
液态氮用于低温学和食品保存。
氮循环
The nitrogen cycle is essential for life on Earth.
氮循环对地球上的生命至关重要。
固氮作用
Nitrogen fixation is a key process in agriculture.
固氮作用是农业中的关键过程。
氮肥
Farmers often apply nitrogen fertilizer to boost crop yields.
农民常施用氮肥以提高作物产量。
二氧化氮
Nitrogen dioxide is a major air pollutant from vehicle exhaust.
二氧化氮是汽车尾气中的主要空气污染物。
电影《终结者2：审判日》中，主角使用液氮冷冻T-1000机器人的经典场景。
The scientists used liquid nitrogen to freeze the biological samples.
科学家们使用液氮来冷冻生物样本。
Use nitrogen naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
谐音'耐吹真'，想象耐着性子吹出占空气78%的氮气。
中性，常用于科学、技术及教育语境，日常对话中也较常见，但整体偏正式。
通常为不可数名词，复数形式罕见
Dictionary facts from ECDICT, WIKTIONARY.