“氮”怎么读

“氮”的英语可以翻译为：[化] nitrogen (7号元素， 符号N)，azote ...

每吨煤平均含30公斤氮.Every tonne of coal contains, on average, 30 kilograms of nitrogen.植物需要氮以便制造蛋白质.The plant requires nitrogen in order to make proteins.空气中所含的氮的比例是多少?What is the percentage of nitrogen in air?...