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hydrogen

英['haidrədʒən]美['haɪdrədʒən]

n.
1.[U]【化】氢

同：	[n.] atomic number 1, h

Hydride: Inorganic compound of hydrogen with another element.
氢化物:氢与另一种化学元素的无机化合物。收藏
A short - lived association of an electron and a positron bound together in a configuration resembling the hydrogen atom.
电子偶素，正电子素电子与正电子的短暂结合物，两者的结合物与氢原子的结构十分相似收藏
The permeation constant of gases through metals is negligible except for hydrogen through palladium or iron.
除了氢气能穿过钯和铁之外,气体穿过金属的透气常数是可以略而不计的。收藏
The element hydrogen comprises 90% of the matter in gaseous nebulae
元素氢占气体星云物质的90%。收藏
The hydrogen in the gauge is ionized by electron emission from a heated cathode
在离子计内的氢气是用一个加热阴极放射电子来电离的。收藏

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a nonmetallic univalent element that is normally a colorless and odorless highly flammable diatomic gas; the simplest and lightest and most abundant element in the universe
[同] h, hydrogen, atomic number 1

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