Mary Kingsley—Victorian Explorer（玛丽·金斯利——维多利亚时代的探险者） WorldPopulationGrowth（世界人口的增长） Changes in the Family（家庭的变化） ..
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使目前状况糟糕的是，至今尚无迹象表明，世界人口的增长在近期内会减慢。
To make the situation worse, there is as yet no sign that any slowing of the world's population is in sight.
到本世纪中叶，世界人口的增长预计将上升近百分之五十，人口数量将超过90多亿。
With world population expected to grow by nearly 50 percent to more than 9 billion people by midcentury, farmland is going to need to be much more productive.
随着世界人口的增长，随着人们对食品的需求——尤其是对肉的需求的增长，对水的需求也会增长。
Demand for water will grow as the world's population increases and as people eat more-and more meat in particular.
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