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距离差吧In Reply To:AC后的疑惑 Posted by:fjnu_jxd_008 at 2005-08-03 19:03:26 > 如果s在S中，那么根据for every point p in S there exists a point q in S such that p-s = s-q. > s该对应什么点，同时p-s中的-是什么意思 Followed by:
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