nitrogen [ˈnaɪtrədʒən]
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基本释义
n.[化]氮
英英释义
a gas with no colour or taste which forms about 78% of the Earth's atmosphere and is a part of all things which live
参考例句
The atmosphere consist of more than 70% of nitrogen. 大气中含有70%以上的氮气。
What is the percentage of nitrogen in air? 空气中所含的氮的比例是多少?
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