多年都是常數不就是零增長嗎？較真一下。兩項是等於的話，隻有一種情況，不可能有其它情況的。

來源: Francine 於 2023-12-31 18:09:47 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次

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