这些数据组成了一份给定任意时间给定城市人口密度的热度图。
The data resembles a heat map of population density in a given city at any point in time.
人口密度的上升，结合其他如气候变冷变旱的因素，使采猎为生的纳图夫人(Natufian—约公元前1万年的史前人)短缺橡果、羚羊和野草种。
Rising human population density, combined perhaps with a cooling, drying climate, left the Natufian hunter-gatherers of the region short of acorns, gazelles and wild grass seeds.
人口密度的上升，结合其他如气候变冷变旱的因素，使采猎为生的纳图夫人(Natufian—约公元前1万年的史前人)短缺橡果、羚羊和野草种。
Rising human population density, combined perhaps with a cooling, drying climate, left the Natufian hunter-gatherers of the region short of acorns, gazelles and wild grass seeds.
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