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helium

美 [ˈhiliəm]英 [ˈhiːliəm]
  • n.氦；氦气
  • 网络食品添加剂氦；高纯氦；氦元素

heliumhelium
权威英汉双解英-汉英-英网络释义

helium

n.

氦

相对原子质量_百度百科 ... hydrogen 氢 helium 氦 lithium 锂 ...

氦气

吸氦气(Helium)会唔会对身体有害?我见有d外国既卡通配音员会吸Helium令自己把声变得卡通化，会唔会上瘾架？

食品添加剂氦

美国FDA 21 CFR 第184部分GRAS物质 -... ... §184.1351 食品添加剂黄芪胶（ Gum tragacanth） §184.1355 食品添加剂氦（ H…

高纯氦

atomic - CAS号查询 ... 钠; sodium; 高纯氦; Helium; 钒; Vanadium; ...

氦元素

氦元素（Helium）下面数字和元素符号各表示什么意义?2S、3H、4Cu、Ag

液态氦

液态氦(helium)：沸点4.2°K，为主要的冷却剂。 ※优点：磁场强度高＞4T、磁场均匀度好、电费少、速度快、讯杂比(SNR)高。

氦原子

已知最小的原子是氦原子(helium), 半径在30pm左右[5].一个pm(皮米)是什么概念? 一个皮米, 就是1×10^-12m[6], 是一个"埃"-Å(Å…

例句：
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He sat down in his lawn chair. Attached to his lawn chair were 105 large helium balloons.
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The sun is relatively young, part of a generation of stars known as Population I, which are relatively rich in elements heavier than helium.
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When the helium content is less than 45%, the character of tri-mixed gas has no evident difference compared with that of argon.
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The way these pebble bed reactors work is the helium comes in up the side and down through the pebble bed. It's not a fluidised bed.
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They observed the oscillations of the helium as it twisted back and forth on the end of a metal rod.
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Astronomers ascribed them to thermonuclear fusion of hydrogen or helium or to the sudden accretion of matter onto the star.
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Why is america wasting its helium? and what is the metal that you were talking about I've never heard of it.
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As the sun burns, the hydrogen in its core converts to helium by fusion, a process through which the nuclei of atoms meld together.
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Betty's helium-filled aerostat, three metres across, is capable of carrying loads of a little over half a kilo.
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Helium 3 is not hazardous or even chemically reactive, and it is not the only material that can be used for neutron detection.
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An increased ADC value indicates that the helium atoms were able to travel farther during the measurement time.
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The output of light and heat of the Sun requires that some 600 million tons of hydrogen be converted into helium in the Sun every second.
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Thousands of cubic metres of helium were pumped into the towering silver canopy of His balloon.
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That left the star with only its helium core, which was a third of the sun's diameter and bore a quarter of its mass.
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Robert Richardson, a Nobel Prize winner, warns helium supplies, commonly used in balloons, will run out in 25 years.
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