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新东方-柯林斯雅思备考词典
hydrogen
英 [ˈhaɪdrədʒən]
[NOUN]
1. [U 不可数名词] 氢
Hydrogen is a colourless gas that is the lightest and commonest element in the universe.
双语例句
例：a ball of liquid and gaseous hydrogen.
一个充满液态氢气和气态氢气的气球。
例：Pure hydrogen is an explosive gas and difficult to store.
纯氢气是一种爆炸性气体，难以储存。