继续数竟或USACO都可以，坚持Model UN, 然后讲好交叉兴趣的故事。M现在自己说看这个。

来源: 其乐无穷于 2025-03-30 18:08:55 [旧帖] [给我悄悄话] 本文已被阅读：次

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