一直数不过来,沉思不解中。。。
数学家喵爸来解释一下这个情况?
俺先跑远一点。
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长跑时候跑到后面人会神志恍惚,哈哈。所以一直提醒自己focus
-落花飘零-
♀
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11/24/2024 postreply
18:33:27
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