An ice age by mid-century would be unimaginably devastating.

到本世纪中叶，冰河时代的破坏力将难以想象。

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In 2020, nuclear power is seen at 86 gigawatts to 550 gigawatts by mid-century.

到2020年，核能排放量将会从上世纪中期的5500亿瓦特减少到860亿瓦特。

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Under current tax and spending policies it is headed towards 400% by mid-century.

在当前的税制及支出政策下，本世纪中期这一数字有望攀升至400%。

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As I've suggested before, his more conservative contemporaries were appalled by the proliferation of religious sects in mid-seventeenth-century England.

这如我以前所说，他的保守的同辈人,因17世纪中期英格兰迅速增多,的宗教派系而惊恐。

耶鲁公开课 - 弥尔顿课程节选

In fact, he actually emphasized a concept that was first stated by a French philosopher Louis Blanc in the mid-nineteenth century.

事实上，他特别看重,一个由法国哲学家路易·勃朗,在十九世纪中期,率先提出的概念。

耶鲁公开课 - 金融市场课程节选

Amsterdam, by mid-seventeenth century, by 1650, increases to 150,000 people.

阿姆斯特丹,到十七世纪中叶 也就是1650年,人口增长至十五万

耶鲁公开课 - 欧洲文明课程节选

By mid-century the number of people over 65 will exceed the number of people under 15.

FORBES: The Second Hill: How American Longevity Might Rejuvenate the World

Global energy consumption will double by mid-century, regardless of what the United States does.

FORBES: What Is Our Energy Future?

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

ECONOMIST: Migration