Border Points: Each cluster has a limited number of defined "border points" – these are the gateways in and out of the cluster.
we would now call a trivial buffer, the 1260's operator could key in the numbers
。关于这个话题，im钱包官方下载提供了深入分析
在海南三亚市那受村，村民苏其文清晨便在田头忙活。村里开设“田间课堂”，他认真当“学生”。从脱贫户成长为十里八乡有名的“植物医生”，他牵头创办专业合作社，各项收入近30万元。
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