A physicist may study one particle of matter.

一个物理学家可能只研究物质的一种粒子。

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Antimatter is the same as regular matter except that each particle has an opposite charge.

反物质与普通物质一样，只是电性相反。

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Antimatter is the same as regular matter except that each particle has an opposite charge.

反物质与普通物质一样，只是电性相反。

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