The most frequently detected chemical compound is water (HOH) with oxygen (o) as one of its atoms.

最常检测到的化学化合物是(HOH)，氧(O)是它的一个原子。

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For most elements the symbol is simply the abbreviated form of the English name consisting of one or two letters, for example: oxygen = O?

对大多数元素而言，其元素符号是其英文名字的简单缩写形式，由一或二个字母组成，例如：氧=O???。

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O is for oxygen. The oxygen is the essential item which the survival cannot leave.

代表“氧气”。氧气是生存离不开的必需品。

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