How well will the patents hold up against challenges from generic companies?

专利如何应对一般公司的挑战？

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Forests give us shade, quiet and one of the harder challenges in the fight against climate change.

森林为我们提供了阴凉、宁静的环境并带给我们对抗气候变化的一个更艰巨的挑战。

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"It should really serve,I think, as a stimulus to us to find ways to recapture the partnership so we can join forces and fight together against the threats and challenges of the 21st century that are no less dangerous than Hitler was in his time."

VOA: standard.2010.05.07

But the country's supreme and constitutional courts have both ruled against challenges to the law.

ECONOMIST: The case for vigilance versus the case for greater liberty

"We are confident in the integrity of our products and our ability to successfully defend our products against challenges, " the company said.

CNN: January 23, 2013 -- Updated 2220 GMT (0620 HKT)

She cited Cowbridge as an example of a thriving high street which had survived against the challenges presented by out-of-town centre and on-line shopping.

BBC: Conservatives debate