名词

1. Water contains hydrogen and oxygen.
水含有氢和氧。

1. 氢气：可使用在有防爆要求的场所. GS 9208 UV 火焰探测器可以提供满足多种工业标准的输出信号接口,可以配接各种其他品牌的控制主机使用. 非碳氢化合物 - 氢气(Hydrogen), 硅烷(Silane),肼(Hydrazine), 镁(Magnesium)等生产、储运.

2. 氢原子：humidity 湿度 | hydrogen 氢原子 | hypothesis 假设

3. 氢氢：hydrogen 氢 | hydrogen 氢氢 | hydrogen-cooled machine 氢冷式电机

1. 氢;氢气
Hydrogen is a colourless gas that is the lightest and commonest element in the universe.

noun

1. 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

Synonym: Hatomic number 1