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首页英语词典heliumhelium英英释意

helium

英 ['hiːlɪəm] 美['hilɪəm]

英英释义实用场景例句

n. [化学] 氦（符号为He，2号元素）

英英释意

1. 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)