It's easy to find isolated cases, but hard to know how often a problem is occurring.
Notice that it's easy to invent new abbreviations but hard to make up new pictograms.
The Saturn V engines could be priceless historically, but hard to put a cash value on.
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But hard and fast standards are what challenge athletes and bring out their best.
The benefits of federalism and proportional representation are widely recognised, but hard to deliver.
But hard to believe that anything significant could result from a little guessing game.
Really sick of bartering, but hard to know how to earn money since the Internet went down.
Most people are uncomfortable with self-promotion, but hard work doesn't always get noticed without a little help.
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But hard work will only get you so far, the rest is genetic, according to Abel-bodied Xavier.
Even in South Africa, which has the best infrastructure, consumers may be eager but hard to reach.
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They look heavy and bulky, but hard thin plastic is quite light, and they are certainly protective.
For dessert, a sublime ice cream studded with sugar cane fudge is a calorific killer but hard to resist.
Chances are that the best candidate for that critical but hard-to-fill IT role already has a job somewhere else.
The lessons they taught were deceptively simple in theory, but hard in practice.
Moody's is telling us that any new president has nothing but hard choices.
But hard-pressed health inspectors may be unable to enforce the new regulations in the face of widespread civil disobedience.
Gas is plentiful but hard to move--hence, in most cases, much less valuable as it comes out of the ground.
The key is keeping the bacteria happy in their little house, warm and well fed, a simple concept but hard to do.
Teacher Paul Scott said the day had been exciting but hard work.
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Authenticity is one of those often-talked about but hard to access ideas.
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This is possible, but hard to prove or disprove, Brent said.
Not putting troops in harm's way, but hard power with altitude.
The Russian was lacking consistency with her serve but hard work put her in control in the decider before more unforced errors brought Mattek back into things.
It's always hard to say how much this kind of personal branding contributes to the success of a business, especially one like fish-farming that's easy to enter but hard to master.
That's absolutely the case in robotics, where it's easy to dismiss early attempts as toys but hard to imagine how robots will fundamentally change our lives over the next few decades.
But at the other extreme are niche networks, less well-known than Facebook, that unite the sort of extremists whose activities are restricted by many governments but hard to regulate when they go global.
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