道尔顿说：尽管人们知道数千种不同的化学物质，但这些物质仅仅是由少数不同种类的原子以一定的简单的方式结合在一起而组成的。
What Dalton said was that, although many thousands of different chemical substances are known, these are made up of only a few different kinds of atom combined together in definite simple ways.
道尔顿说：尽管人们知道数千种不同的化学物质，但这些物质仅仅是由少数不同种类的原子以一定的简单的方式结合在一起而组成的。
What Dalton said was that, although many thousands of different chemical substances are known, these are made up of only a few different kinds of atom combined together in definite simple ways.
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