helium
发布时间:2025-11-22 11:55:19
helium汉语翻译:
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
例句: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.空气一种无色、无嗅、无味的气体混合物,主要由氮气(约占78%)和氧气(约占21%)组成,还有少量的氩、二氧化碳、氢、氖、氦及其它气体
详细解释:he.li.um
n.Symbol He (名词)符号 He
A colorless, odorless inert gaseous element occurring in natural gas and with radioactive ores. It is used as a component of artificial atmospheres and laser media, as a refrigerant, as a lifting gas for balloons, and as a superfluid in cryogenic research. Atomic number 2; atomic weight 4.002'; boiling point -2'8.9=C; density at 0=C 0.785 gram per liter.See table at element
氦:自然界天然气体或放射性矿石中一种无色、无味的惰性气体状成分。用作人造大气层和镭射媒体的组成部分,和用作制冷剂及飞行气球的气体,还在低温学研究中用作超流体。原子序数2;原子量4.002';沸点-2'8.9=C;浓度在0=C时为每升0.785克参见 element
来源:
From Greek hôlios [sun (so called because its existence was deduced from the solar spectrum)] * see s3wel-
源自 希腊语 hôlios [太阳(该元素的存在首先是在太阳光谱中测得,故名)] *参见 s3wel- helium
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