But, at the same time, we do know about the atomic theory of matter.
但是，同时我们也知道，物质的原子理论。
The present symbols express the system set out by the atomic theory of matter.
现在化学符号则表示化学中物质的原子理论的系统性。
Before the atomic theory of matter, and molecules, and so forth was well worked out.
在物质的原子，分子理论，和其他理论之前。
Before the atomic theory of matter, and molecules, and so forth was well worked out.
在物质的原子，分子理论，和其他理论之前。
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