回複：回複：for two guys above: be rational instead of emotional

來源: 皆兄弟也 於 2010-05-14 08:03:49 [] [博客] [舊帖] [給我悄悄話] 閱讀數 : (218 bytes)

If the duck swims straight forward with an angle, the fox can run the shorter circle. If this angle is big enough, the duck would be caught.
If the duck can change the direction at any moment, it's too complicated.

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