一升液體，加一升液體，不是兩升。符合同物質，同單位。實質是，同物質是個概念，由人定義。

來源: 駱駝123456 於 2025-11-20 09:21:16 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次

WENXUECITY.COM does not represent or guarantee the truthfulness, accuracy, or reliability of any of communications posted by other users.