人口对于可利用资源的压力是明了历史的关键，所以，任何的历史写作如果没有认识到人口统计学的事实都是本质错误的。
The pressure of population on available resources is the key to understanding history; consequently, any historical writing that takes no cognizance of demographic facts is intrinsically flawed.
人口对于可利用资源的压力是明了历史的关键，所以，任何的历史写作如果没有认识到人口统计学的事实都是本质错误的。
The pressure of population on available resources is the key to understanding history; consequently, any historical writing that takes no cognizance of demographic facts is intrinsically flawed.
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