There are no running plays, but you can always have your quarterback scramble or choose a play that includes a lateral pass.
But you always know what you would like to have done, given the time and the right contributors ... and a bit of luck.
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"It depends on the mission, but you'll always need to have that critical thinking capability in a pilot, " says Major Rod Secor of the U.S. Army's Unmanned Aircraft Systems division.
If you're injured you know there's no coming back, but when you're ill you always hope that you have a chance.
"I don't really know what else to say, but I know we have our differences, but I will always love you unconditionally, " he wrote at the end.
You may think you have the worst job in America but are you always on call and facing a deadline, working in a high-stress environment, all for very little pay?
If it's an 18-hole match, you might play the first 15 the way you'd always play them, but then if you're down you might have to be a little bit more aggressive.
If you play tennis, it's always the same rules and you have the same lines on the court, but you're always working on a different part of your game.
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"I didn't hit the ball very well this week, but it's OK. You know you always have next year to come back here, " she said.
"You always wonder if you could have done anything better, " Toshack said, but denied that Savage would have made any difference.
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But look closer and you find that ordinary people have always silently played a role.
Prevention work is always a good thing but you still need to have the capability to react when something does happen.
You will have your own favourites, but I always liked the Traffic Light Tree in London's Docklands, a bewildering display of red, amber and green which kept me waiting, transfixed and tense, for really quite some time when I first encountered it.
They have great yields, but as always you should do your own due diligence before investing.
Virtually anything essential is scarce unless you have foreign currency, but not even that always does the trick.
You always cherish where you come from, but I also have the need for new sensations, and to improve on those old traditions.
But just keep in mind: if you are an investor, always have a shopping list.
My mom always said you either have time or money but rarely both.
Skelly revealed they have written "13 or 14 tracks but you can always write more".
You know, he was always have good presence, but he had some things go kind of bad.
"I feel I have been playing well with Celtic, but you are always judged on goals as a striker, " he said.
But I have always tried to avoid making comfortable speeches to you.
But even if you have a lot of money saved, cashing in will not always work.
But the truth is that sometimes employers may not always know about all that you have to offer.
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But the fighters always have a shot at turning a corner, and if you holler loud enough, sometimes somebody hears you.
Major airlines always have the ability to switch you to another carrier, but they are loathe to do this as it means passing your ticket revenue onto a rival.
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The best teammates may have wise criticism but are always focused on the same objective as you.
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But you know what, I've always thought it's a good idea to have a woman's hand on the wheel as well.
"But I've always felt you could only do this as a United Kingdom and there have always been very strong arguments made in Scotland, " he said.
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