He believed that the changes things undergo could be explained in terms of rarefaction and condensation of air.

他相信物质的改变可以被解释为一系列的气体的稀释和浓缩。

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He believed that the changes things undergo could be explained in terms of rarefaction and condensation of air.

他相信物质的改变可以被解释为一系列的气体的稀释和浓缩。

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