氦的用法和樣例:
例句
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空氣一種無(wú)色、無(wú)嗅、無(wú)味的氣體混合物,主要由氮氣(約占78%)和氧氣(約占21%)組成,還有少量的氬、二氧化碳、氫、氖、氦及其它氣體
A colorless, odorless, tasteless, gaseous mixture, mainly nitrogen(approximately78 percent) and oxygen(approximately21 percent) with lesser amounts of argon, carbon dioxide, hydrogen, neon, helium, and other gases.