研究人员称，到本世纪中期，全球人口将会稳定在90亿左右。

Researchers say the world's population will level off at about 9billion in the middle of the century.

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作者们否定了气候变化将会造成到本世纪中期之前出现两亿难民的不切实际的预言。

The authors knock down wild predictions that climate change will create 200m refugees by mid-century.

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气候变化开始产生影响，我能很肯定的说，到本世纪中期，这将成为造成未来英国野生动植物灭绝的主要原因。

Climate change is beginning to have an effect, and by the middle of the century I am sure it will be accounting for the vast majority of future extinctions of English wildlife.

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CBO之前曾表示，随着美国老龄化加重，如果现行政策不变，理论上，到本世纪中期，债务将增至GDP的400%。

But the CBO has previously said that, as America ages and if current policies continue, it could theoretically hit an otherworldly 400 \ % by mid-century.

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总之，战斗死亡人数从二十世纪八十年代中期的每年20万人减少到本世纪零零年代中期的2万人以下。

In total, the death toll in battle fell from over 200,000 a year in the mid-1980s to below 20,000 in the mid-2000s.

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总之，战斗死亡人数从二十世纪八十年代中期的每年20万人减少到本世纪零零年代中期的2万人以下。

In total, the death toll in battle fell from over 200,000 a year in the mid-1980s to below 20,000 in the mid-2000s.

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