详细解释:n. 氦
【化】 氦
【医】 氦(2号元素)
词型变化：
简写符号:He英语解释：
名词 helium:
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)同义词：He, atomic number 2