But pinning mofongo to a specific place in Puerto Rico is challenging, if not outright impossible.
Mr Trump is challenging the Scottish government's decision to grant planning permission for the wind farm.
Today, China is challenging the US in the number of new biotechnology companies created annually.
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Charging the ramparts is challenging enough without an eye to the rear fearing friendly fire.
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Allowing, accepting and addressing those vulnerable feelings that come with dust storms is challenging work.
Dan Seals and Debbie Halvorson, and Bill Foster, who is challenging a Republican lawmaker.
By threatening this arrangement Veeck is challenging a basic feature of the modern regulatory state.
He admires the new craftsmanship in pizza, but says the bottom line is challenging.
The British Government has ruled that out, but the Finucane family is challenging that decision.
For instance, Iran is challenging Saudi Arabia's ability to guarantee the stability of global oil markets.
Now Serono, like Amgen and Genentech, its bigger and better-known American brethren, is challenging this distinction.
In this way he is challenging the prosecution to prove that the material was classified.
Using her own story to inspire others, Xian is challenging traditional ideas of what beauty is.
An Austrian energy beverage company, Red Bull, is challenging both companies worldwide, including their own home turf.
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Marketing to pension funds is challenging for even the largest investment managers, custodians, brokerages and consulting firms.
Butterfield is challenging the conventional gaming wisdom that nihilistic killing is necessary to build a popular game.
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This is just one more move by the company that is challenging my extreme dislike for it.
Gathering height-and-weight data in countries spread over two or more islands, with many remote villages, is challenging.
For a chronic disease drug in an therapeutic category where good treatments already exist, this is challenging.
Gavignet admits the Route du Rhum is challenging, perhaps even risky, but he says, it's not dangerous.
Autonomy is a high priced enterprise product that Google is challenging through its Google Search Appliance.
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Peddling to them is challenging, he adds, precisely because they are savvier than their purchasing power would suggest.
"The environment is challenging, " he told reporters at the company's headquarters in the south Indian city of Bangalore.
Republican White House hopeful Mitt Romney is challenging supporters to create their own TV ad for his campaign.
It is understood that one of them, Doros Michail, is challenging the payments issue in the High Court.
He is challenging the legal bid to obtain the transcripts, claiming it will put his life in danger.
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But it is challenging the ruling in order to avoid having other such restrictions placed on its content by other jurisdictions.
At the top of every CEO agenda is growth but with the economy still sputtering, achieving it is challenging.
While it is challenging to define precise triggers ex ante, we might be able to determine them in principle.
Like Rajaratnam, Gupta is challenging the use of those taps at his trial.
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