字典網>> 英漢字典>> H開頭詞條>>helium的意思

helium

音標['hi:li?m] 讀音
helium的德文解釋

漢語翻譯


n. 氦
【化】 氦
【醫】 氦(2號元素)

詞型變化：

簡寫符號:He 

英文解釋：

名詞 helium:

  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)
    同義詞：He, atomic number 2

例句：

  1. 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.
    空氣一種無色、無嗅、無味的氣體混合物，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

詳細解釋：


he.li.um

n.Symbol He （名詞）符號 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：自然界天然氣體或放射性礦石中一種無色、無味的惰性氣體狀成分。用作人造大氣層和鐳射媒體的組成部分，和用作製冷劑及飛行氣球的氣體，還在低溫學研究中用作超流體。原子序數2；原子量4.002'；沸點-2'8.9=C；濃度在0=C時為每升0.785克參見 element

來源：
From Greek hôlios [sun (so called because its existence was deduced from the solar spectrum)] * see s3wel-
源自 希臘語 hôlios [太陽（該元素的存在首先是在太陽光譜中測得，故名）] *參見 s3wel-

展開閱讀更多↓

猜你喜歡：