Background: Deep in the bowels of Cheyenne Mountain is a city-like military complex that once served as North American Aerospace Defense Command (NORAD) 's center.

背景材料：在夏延山的深处像一座城市一样的军事综合隧道，一度作为北美防空司令部(NORAD)的中心。

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Sondheim's work is notable for his use of complex polyphony in the vocal parts, such as the chorus of five minor characters who function as a sort of Greek chorus in 1973's a Little Night Music.

桑德海姆的作品向来以歌唱部分复杂的多重声部出名，例如1973年《小夜曲》中五个小角色组成的希腊合唱组。

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S. soldiers in a human chain moving nearly 10 tons of munitions from a bunker complex under the Oruzgan district headquarters into trucks.

他们正在与美军士兵一起通过接力传递方式把将近10吨的军需物资从乌鲁兹甘区域作战指挥所下面的掩体里向外转移到卡车上。

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A new book about America's public universities explores the complex causes of the high dropout rate.

VOA: special.2009.09.10

That's really a complex systems problem, the kind of problems that engineers are very good at dealing with.

这真是复杂的系统性问题,解决这类问题,恰恰是生物医学工程的拿手好戏

耶鲁公开课 - 生物医学工程探索课程节选

In the works that Milton is going to be publishing now with greater and greater frequency, it's this Spenserian ideal of marriage that will be the new and, believe me, the endlessly complex Miltonic subject.

在弥尔顿准备出版的作品中,越来越常出现的，是斯宾塞式的婚姻理想，那将是崭新的，相信我，也是无尽而复杂的弥尔顿风格的题材。

耶鲁公开课 - 弥尔顿课程节选

Lavine comes from Barclay's Global Investors, the fund complex of Britain's Barclays that happens to be among the biggest managers of ETFs.

FORBES: A Tree Of Wisdom

He remembers that during Lucent's IPO, D'Amelio digested binders full of complex information and convinced investors of the company's prospects.

FORBES: Magazine Article

The court's report said most errors arose from "misapplication or misunderstanding" of the EU's complex rules, though there were some suspected cases of fraud.

BBC: EU criticised for wasting funds