世界人口增长问题 The World Population
世界人口增长很快 World population growth soon
探究世界人口增长曲线 world population
世界人口的增长 WorldPopulationGrowth
然而，随着世界人口增长，竞争也愈加激烈。
However, as the population of the world is getting larger, competition is getting fiercer.
本世纪世界人口增长了两倍多，世界产出也大幅增长，所以你会认为地球本身也受到了影响。
The world's population has more than tripled during this century, and world output has risen hugely, so you would expect the earth itself to have been affected.
在此期间，世界人口增长了每年1.8%。
During that period the world's population was growing by an average of 1.8% a year.
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