In practice, I think it's very difficult to do on any kind of a scale.
His team cloned the first dog, considered very difficult to do because of the reproductive cycles.
One reason few cyclists traverse Trail Ridge Road is that it logistically difficult to do.
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She's stayed at the top in a business where that's very difficult to do.
Until Mr Greenspan raises interest rates, China's monetary authorities will find it difficult to do so.
Historically, predicting the future sales of compounds in clinical development is difficult to do.
Prior to the internet, it was very difficult to do unsolicited remixes of music.
But for all the votes he won, Mr Abbas will find it difficult to do that.
That means consumers who choose to avoid genetically engineered fish may find it difficult to do so.
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We don't wear our stiff upper lips on our sleeves (which is actually quite difficult to do).
Either way, according to the economists, it would be difficult to do much worse than George Bush.
"It would probably be difficult to do the traditional or banner advertising in this space, " he says.
Of course, I would be equally unsurprised to have it turn out to be too difficult to do.
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By revealing authorship the intelligence authorities have just made it more difficult to do the next intelligence operation.
But keeping human information for the long term is more difficult to do.
It became increasingly difficult to do this work alongside his regular medical practice.
Adjusting your brain to new contexts is difficult to do on its own.
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This can make it very difficult to do any kind of due diligence.
Wayne's out of contract, he's one we'd liked to keep but it might be much more difficult to do that now.
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Defending large-scale networks is exceptionally difficult to do in the face of one or many skilled adversaries with focused intent and time.
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To drink good coffee in the US you have to make it at home, and even that is difficult to do right.
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Borer says such a trial might be difficult to do, especially if its only aim is to prove the drug is safe.
We will miss him and it will be difficult to do it without him but we have the players to do that.
It does something that is very difficult to do in a classroom.
Having grown up in Baghdad, both rowers know the frequent disruptions to their training will make it difficult to do well in London.
For the government, Care Minister Paul Burstow acknowledged the matter had "for far too long been left in the 'too difficult to do' drawer".
The electric third rail makes it more difficult to do maintenance safely. 1000V DC current will literally burn a person to a black crisp.
Let such low margin, low value things be made by poor people elsewhere while we concentrate on the high value, difficult to do, things.
Ironically, India continues to tout their own efforts in drug discovery, although this has been more difficult to do than was originally envisioned.
The bad news is that these data make it clear that it will be much more difficult to do that than the McAllen bashers thought.
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