For many photographers it is one or the other, as to shoot in both colour and black and white at the same time is not something that many can achieve.
It may just be that the virus turns up in bees that are sick for other reasons, or that it is one of many triggers, potentially including pesticides or other pathogens, that can cause a whole hive to die off.
Set up in honour of the veteran broadcaster, it is hosted by one or other of his sons, David or Jonathan, who both followed their father into broadcasting.
But it is also possible that one or other of them will win through, with a significant effect on this year's summer ice.
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However one feels about the Arab-Israeli conflict, it is possible to support one side or the other while retaining a shred of humanity.
The price of leather is what it is whether one is in China or the US, and the same is true most other costs.
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But it is necessary to look at the set of trade offs, not just one or other aspect of it.
"All it will take is one or two high-profile companies to migrate to Apple to open the floodgates for other IT managers to realize that they, too, should consider moving to a new platform, " Pile says.
As traders can see, they give very disparate pictures, but it is my opinion that technicians will be drawing in one or the other of these two lines.
As a consequence of this additional uncertainty, if the quantum demon makes a measurement of a nucleus which forces it to choose one state or the other, he is creating new information.
Whether this is a comment on the mania of collectors to possess a work of art regardless of the consequences or the fact that the thieves are unable to locate a buyer is unknowable--but it's usually one or the other.
The government says its preferred option is to remove all foreign language voiceovers and interpreters from both parts of the driving test, but it is also consulting on doing nothing or removing support from one or other parts of the test.
BBC: Driving test translations and interpreters may face axe
Yes, investor sentiment is a contrary indicator when it reaches extremes in one direction or the other, the market usually moving contrary to what the majority expects.
We believe that demand for these products will continue to grow and it is likely that in 2012 or at least by 2013 at least one other HDD company will introduce a similar hybrid HDD product.
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For it is the complete set that produces the observed result, not just that one or other aspect.
Though it is tempting to suppose that the situation will be resolved, one way or the other, over the next few weeks, the crisis facing the Islamic republic may continue for far longer.
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It is fair to argue whether the balance should be tilted a touch one way or the other.
It's not clear why the choice now is suddenly to look for one or the other but not both.
"I think it is important that we not let a case cause us to go to one extreme or the other, " Reno said.
The variance in comparative values between the two metals makes it difficult to pinpoint a magic ratio that suggests one metal is cheap or expensive relative to the other.
Do you follow the un-tested law and continue with the run-off with one presidential candidate on the ballot making it plainly obvious who the winner will be long before even one vote is cast or look for other options.
China today is a country galloping into a century many people believe it will define, one way or the other.
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Even low hanging fruit is being ignored, I suppose, because one side or the other needs it for future bargaining chips.
It is irresponsible to make one that is absolutely unbreakable, even in the face of an economic depression or other national catastrophe.
The present political balance in America is poised so delicately between the parties that a single news development can tip it one way or the other.
Based on what we have learned, it is likely Jim is being held with one or more Western journalists, including most likely at least one other American.
It was not fixed in 2010, it has not been fixed in 2011, and every other year will be just like the prior one until it is solved, painfully or otherwise.
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But carbon is different from other pollutants, he notes, saying that it is globally released and action by one state or one region will have little affect.
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