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Re:依次求两点的中点，然后最后一个点和第一个点再求一个中点就行了。哎In Reply To:依次求两点的中点，然后最后一个点和第一个点再求一个中点就行了。哎 Posted by:acmfjk at 2007-03-20 00:20:28 为什么是这样的啊，不懂啊。。。。，求大牛解释 Followed by:
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