一升液体，加一升液体，不是两升。符合同物质，同单位。实质是，同物质是个概念，由人定义。

来源: 骆驼123456 于 2025-11-20 09:21:16 [博客] [旧帖] [给我悄悄话] 本文已被阅读：次

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