The task facing medicine in the twenty-first century will be to redefine its limits even as it extends its capacities.

21世纪医学面临的任务将是重新定义其限制，即使它扩大了其能力。

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When the new art practice completely break the limits of art institutions, art legitimacy of the institutions is facing the danger of being deconstructed, the End of art has also been proposed.

当新兴艺术实践完全突破了艺术体制的限制时，艺术体制的合法性面临着被解构的危险，艺术终结也就被提出。

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The most important task we are facing is to strictly control blood screening. Conventional ELISA still has its detecting limits, eg: low-throughput, time-wasting and low sensitivity.

目前最主要的任务就是严格控制对外来血源的筛查，而传统的ELISA方法检测血液传播疾病的方法仍在不同方面存在局限性，如检测通量低、需时长、灵敏度较低等。

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BlackBerry service is facing limits or bans in some countries over the issue of government access to information on its network.

VOA: special.2010.08.06

By contrast, Europe, Japan, and the U.S. are now facing potential limits to their ability to finance their public debts.

FORBES: President Obama's Strategic Blunder With China

Parsons was rumored in 2006 to be eyeing a run to be mayor of New York City when Mike Bloomberg would have been facing term limits and required to leave in 2009.

FORBES: Obama Does Not Need Dick Parsons

As long as the FCC fails to inject major amounts of spectrum into the marketplace, or strongly hints that future spectrum could be off limits to carriers with specific spectrum portfolios, the agency leaves companies facing capacity shortages in the near term with no solution other than secondary market purchases or to raise retail prices.

FORBES: Time For The FCC To Auction Off More Wireless Spectrum