Regulators are finding it hard to crack this problem, not through lack of will or imagination but because they are being excessively cautious, seeking certainty before they act.
This is one reason why Apple and Google are finding it hard to crack the enterprise world, while uncool companies such as Oracle, Cisco, Microsoft, and IBM rule them.
Many companies have tried and failed to break the US market, but it has proved a hard nut to crack for UK retailers.
The purchase will provide Toshiba with insider access to the hard-to-crack electric-utility procurement process.
At first, the obsession with conventional degrees will be a hard nut to crack.
England scented a rout, but found the sixth-wicket combination of Mashud and Mushfiqur a hard nut to crack.
BBC: SPORT | Cricket | Ban v Eng 2003 | England take control
"It's a very hard perimeter to crack, as we saw today, " Jeffrey said.
Hydraulic fracturing or "fracking" is a process of forcing water mixed with chemicals through deep wells to shatter and crack hard shale rocks to release the gas inside.
Hydraulic fracturing, also known as fracking, involves drilling down and creating tiny explosions to crack the hard shale rocks to release the gas inside.
The beer market there is enticing because of rapid growth, but it is also highly fragmented and hard for big western brewers to crack.
ECONOMIST: InBev succeeds in its $52 billion bid for Anheuser-Busch
Those high margins are protected, of course, by a ring of defensive regulations, Bar Association rules and deeply ingrained habits that make it hard for an investor-controlled business to crack the legal profession.
And after a year and a half or so, the FBI were able to crack it and open up his hard drive.
Mr. LARRY NOBEL (Former General Counsel, Federal Election Commission): If somebody sees a crack in the door, it's hard to stop them from opening it up.
I'll give it a good crack, but I know it is going to be hard to break in due to the way Kieran Campbell is playing at present.
We have a laugh, we have a crack but when it's time to get down to business we get down and train hard -and that's all down to Rob.
BBC: Great Britain amateur boxers praise coach Rob McCracken
Barring a complete crack up of the eurozone, a China hard landing, and a U.S. recession due to failure in the fiscal cliff talks, oil will likely be another boring commodity in 2013.
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