Working visas to Hong Kong are tied to a job offer, which is only considered valid if there is difficulty in finding a local candidate.
There is also a structural difficulty: national governments still inhabit worlds of partisan party politics.
Robin: Is there still a difficulty for aid agencies to get the sort of supplies that are needed in to the areas where they are needed?
Mr. Nordberg, who said he wants to make a lot of "noise" with a new product at the Mobile Word Congress in Barcelona in February, said there is no technological difficulty in launching a gaming-oriented phone.
There is also the difficulty of telling the story of the Troubles in a way which is accessible to outsiders and acceptable to those who were touched directly by the conflict.
"The notion of a 'graveyard of empires' is actually a false extrapolation from something that is true -- that there is tactical and strategic difficulty, " Porter says.
There is a risk that, just when borrowers get into difficulty, hedge-fund clients may demand their money back.
The basic difficulty is that within the EU there is a minimum VAT (think a type of sales tax) rate.
Then there is the continued difficulty same-sex couples face in getting a legal split.
The German people are hostile to expanded support for eurozone economies in difficulty, such as Greece and Spain, and there is a possible bailout for Spain looming.
Miyamoto recognizes that there is pleasure in difficulty but also in ease, in mastery, in performing a familiar act with aplomb, whether that be catching a baseball, dancing a tango, doing Sudoku, or steering Mario through the Mushroom Kingdom, jumping on Goombas and Koopa Troopas.
But then there is another difficulty: making the components exactly the right size is even more crucial for a quantum-effect device than for a regular transistor.
In some respects, a further ban on new Internet taxes is neither here nor there, because the real problem is the difficulty of collecting those old taxes that should already apply to e-commerce.
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