But in the changed environment, old friendships can no longer be taken for granted.
In this changed environment, international actors need to tread wisely.
Now eReaders, tablets and web downloads have changed the environment.
Clearly, the physical environment has changed very substantially, but what about the economic environment?
Although this model was brilliantly designed for domination, when the environment changed it proved disastrously inflexible.
"It's just a matter of America being very cognizant of the fact that our environment changed on September 11, " Ridge said.
Departmental deputy secretary, Catherine Bell, said the programme was a response to an employment environment changed by the recession, in which it is more difficult to find employers willing to pay apprentices.
"The whole environment has changed dramatically in the last few months, " said IHS Global Insight economist Howard Archer.
She said the international environment had changed since the treaty was signed during the Cold War in 1972.
Many were convinced that the environment had changed drastically and that it was time to consider new strategies.
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The environment should be changed so that entrepreneurs like Steve Jobs can create jobs and businesses can focus on managing innovation instead of the environment.
At Goldman Sachs, another American investment bank, analysts argue that Europe's shares are worth more today than in the 1980s because the economic environment has changed.
Since that time, however, the audit market environment has changed.
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The former Pennsylvania governor said that "the environment has changed since September 11, and it is now "very important ... for America to remain on the highest possible alert.
It is just as plausible that selfish genery arrives rapidly at optimal designs, and that these shift only when what is optimal alters because, say, the environment has changed.
When asked in May how much the economic environment has changed their shopping patterns, only 27% said it's changed their behavior "significantly, " down from 34% who said so last August.
Look, I think the environment has changed dramatically.
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It's important to know that our commitment to protecting the environment has never changed, and today it is as strong as ever.
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"It's important to know that our commitment to protecting the environment has never changed, and today it is as strong as ever, " the statement says.
Several banks are adjusting fees because the banking environment overall has changed, but the more extreme the fee hike, the more wary you should be.
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Now add the demands of the modern computing environment, which means that the computing environment must be changed rapidly in response to failure or changing requirements.
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He said the "financial environment" had changed since the offer was first made in March and he "fully sympathised" with council employees over the pressures they faced.
Max Perutz, a biologist at the Medical Research Council's laboratory in Cambridge, England, has been trying to find out what it is in the environment that has changed.
At a time of massive and rapid increase in agricultural productivity, when natural resources still seemed limitless to the casual eye, it changed our understanding of the environment and of our role in it.
Also, IT will have to track and manage an environment that is being changed by end-users who are empowered to meet their own needs.
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