加氢
Water contains hydrogen and oxygen. 水含有氢和氧。
Water is composed of hydrogen and oxygen. 水由氢和氧组成。
Water is composed of the elements hydrogen and oxygen. 水是由氢元素和氧元素组成的。
Water may be resolved into hydrogen and oxygen. 水可以分解为氢和氧。
The hydrogen is the known the lightest element. 氢是已知的最轻的元素。
Hydrogen and oxygen combine/Hydrogen combines with oxygen to form water. 氢与氧化合成水。
