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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As Barack Obama prepares to take office, some are predicting that America has reached the limits of its superpower status and is now facing a decline in our ability to shape world events.

如今，奥巴马就要执掌美国，一些分析家预测美国霸主地位难保，因为目前美国对国际事务的掌控力日益衰弱。

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Facing the quality of main market of our bee products, the safety and health and the technical standard are strictly day-by-day, which limits the exportation of bee products enormously.

面对我们蜂产品的主销市场的质量、安全卫生和技术标准日趋严格，极大的限制了蜂产品的出口。

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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