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.
虽然看上去不像，世界人口增长确实在减慢。
Odd though it seems, however, the growth in the world’s population is actually slowing.
你知道世界人口增长有多快吗？
世界人口增长如此之快，世界已经变得非常拥挤。
The world population is rising so quickly that the world has become too crowded.
但是在过来的三、四百年间，世界人口增长很快。
But during the last three or four hundred years it has grown very quickly.
但是在过来的三、四百年间，世界人口增长很快。
But during the last three or four hundred years it has grown very quickly.
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