Developed with the U. S. Air Force Research Laboratory, and further refined with NASA, the HWB also features an unusual propulsion arrangement that houses the engines in overwing nacelles.

与美国空军研究实验室开发，并与美国航空航天局进一步改进，在引擎机舱的发动机上，HWB还具有一个不寻常的推进配备。

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Bernanke's bluntness was unusual because people assume the U. S. is now dependent on China to buy its debt.

贝南克的率直是不同寻常，因为人们都认为美国现在依赖于中国购买其债券。

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We told you last year that very unusual conditions then existed in the corporate and municipal bond markets and that these securities were ridiculously cheap relative to u.

我们去年曾告诉你，公司和市政公债市场存在非常罕见的情况，这些证券与美国财政部的相比非常便宜，我们通过几项采购支持了这个观点。

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It was an unusual Saturday night showdown in the U.S.Senate on whether a health care reform bill pushed by Democrats should proceed to the floor for full debate.

VOA: standard.2009.11.23

Last week in New York, Iranian Foreign Minister Manouchehr Mottaki invited diplomats from all 15 U.N.Security Council member countries, including the United States, to an unusual dinner meeting.

VOA: standard.2010.05.14

But General McChrystal has warned that more are needed. On the contested outcome of last month's presidential election in Afghanistan, Spanta said voting "irregularities" are not unusual in emerging democracies and that the Independent Electoral Commission and the U.N.-supported Election Complaint Commission are working to address the complaints and recount some of the ballots.

VOA: standard.2009.09.29

Air India's move is unusual as U.S. regulators extended its ban to test and delivery flights, as well as commercial operations.

WSJ: Air India Flew Boeing 787s After 'Grounding'

While it is not entirely unusual in the U.S. for prominent corporate executives to sit on multiple boards, they are not spread nearly as thin as their Islamic scholar colleagues.

FORBES: Magazine Article

Except in highly unusual circumstances, the U.S. government should maintain political relations with other nations.

FORBES: The Isolationist Charge: The Last Refuge Of The Scoundrel