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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By mid-century, two-thirds of the world's population will live in cities. The demands for energy, water, housing, and education will be enormous.

到本世纪中叶，世界人口的三分之二将居住在城市，对能源、水、住房和教育的需求将是巨大的。

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A 2007 study by the U.S. Geological Survey found that two-thirds of the polar bears on the planet could disappear by mid-century if Arctic ice keeps melting.

美国地质调查局2007年进行的一项研究发现：如果北极地区的冰层持续融化，那么地球上三分之二的北极熊在本世纪中叶前就可能消失。

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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

Likewise, the neighboring 559 units of Golden Lane Estate built in 1963 by the same architects, also Grade II though less costly, are eagerly snapped up by mid century design purists.

FORBES: South Place Brings Art Hotel Cool To London's Finance District

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?