CARBON is the basis of more molecules than all the other elements put together.It is, though, surprisingly inert.
以碳元素为基础构成的分子比其它所有元素构成的分子的总数还要多。
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Noble gas (or inert gas) : Any of the six chemical elements that make up the rightmost group of the periodic table as usually arranged: helium, neon, argon, krypton, xenon, and radon.