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Noun:
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a very light colorless element that is one of the six inert gasses; the most difficult gas to liquefy; occurs in economically extractable amounts in certain natural gases (as those found in Texas and Kansas)
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用作名詞 (n.)
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Helium and neon are inert gases.
氦和氖為惰性混合氣體。
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Most big balloons are now filled with helium.
接下來更多大婚禮氣球中充的是氦氣。
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大于內部強勢來襲創作方法,受著述權保證,侵權案必究
海詞詞典下載,十六年產品