Today's Rocket Words: Your 5 words and meanings to learn

物质形态

物质总以三种不同形态中的一种出现。

粒子

组成物质的小单元。

体积

某物占用的空间大小。

物质

既占空间又有质量的东西。

结合

两种或更多物质之间连接在一起。

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