這充其量隻是證明了解的存在性，至於解的具體途徑是什麽沒有線索！把每一條的條件列出來應該更清楚。

來源: 方外居士於 2024-10-03 12:00:08 [舊帖] [給我悄悄話] 本文已被閱讀：次

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