The gist: a circle missing a part still feels like a circle.

回答: I have just googled it. Sounds interesting to me.shuier2023-06-24 11:17:18

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就是说:不必面面俱圆嘛! -寒苇- 给 寒苇 发送悄悄话 寒苇 的博客首页 (0 bytes) () 06/24/2023 postreply 16:29:55

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