假设某地域内每个居�的重量都相等则在该地域全部空间平面上力矩达到平衡的点就是人口重心每当人口分布状况�生变化人口重心就会有相应的移动从 Template




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tomski假设某地域内每个居�的重量都相等则在该地域全部空间平面上力矩达到平衡的点就是人口重心每当人口分布状况�生变化人口重心就会有相应的移动从 coloring