雖然數學競賽是單槍匹馬，但是有一幫小孩一起練互相商討才比較有勁頭，包括在網上。

來源: Numero 於 2025-06-09 03:51:38 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次

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