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氮<br />
Nitrogen (N)<br />
沖 淡 空 中 氧 氣 的 氣 體<br />
nitrum = 硝 石 ( 火 藥 成 份 )<br />
gen = generate 產 生<br />
Nitrogen = 產 生 硝 石 的<br />
元 素
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