Only by load-shedding can enough be kept back for peak use through the winter.
And clearly, there is a fear that weapons might be kept back, a threat to any fair elections.
However, there are suspicions that the money is being deliberately kept back to help plug gaps in the central budget.
Having suffered heatstroke the previous day Peter had been kept back at base, but he saw his injured friends brought in.
The other big target is Dish Network's reserved spectrum, kept back for its own planned broadband network, but if it fails to get Government approval, it might look to offload it.
Instead, he says, half the money will be lent to rising stars in the private sector, and the other half kept back for when the oil price falls.
Another 3% of the workers' pay is kept back to pay the management fees, which are regulated, and to finance a disability insurance fund for the system as a whole.
As the chasm grew between Alabama and the other team -- the name will surely come back to us soon -- ESPN kept going back to the well, repeatedly showing Webb cheering in the crowd, wearing her boyfriend's No. 10 jersey.
But I just kept coming back to this piece that I wrote three years ago.
In this case, that kid's story kept coming back and wouldn't let me go.
"I've kept enough back...just enough, " Clapton says in an interview published in the auction catalog.
He kept harking back to the days of Ozzie and Harriet, when life was so much simpler.
She kept her back to us, but I associated the water running into the dishpan with her tears.
Stills says he kept coming back to this particular project over the years, but couldn't quite finish until now.
"But the virus kept coming back, " a source familiar with the infection says.
Fences, barbed wire and a strong police force kept them back from the delegate gathering at Chicago's International Ampitheater.
Amazingly, I gave a one-hour TV interview in Shanghai and my questioner kept coming back to that second question.
It's a word he kept coming back to in his prepared statement at the start of his news conference earlier this week.
He gushes about a little boy with Down syndrome who kept coming back to him, running at full speed for extra hugs.
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Stevie kept her back straight, and she smoked in a sexy way.
It went away again but just kept creeping back during the matches.
He remembered nothing of the mysterious realm he kept receding back into.
But I kept reflecting back on my experiences in Vietnam, and I felt a growing desire to make a difference in the world.
As the days went by, other explanations occurred to him, but he kept coming back to the idea that his work had been plagiarized.
"We've got to be careful that this thing doesn't spread and other guys start dropping so we kept them back at the hotel, " Woodson said.
She kept coming back to that one, key point: about appearance.
He kept him back awhile, then promoted him to senior switchman.
But the company kept coming back with more and more questions, and a year later they made a seven-figure offer with a per-unit royalty tacked on as well.
Here on Forbes.com, and over HBR, on tech and professional service sites, and sites that cover the emergent business world, that commentary kept coming back to social.
"I thought our guys, we took a big punch in Game 1 and we kept fighting back and that's been the story of the season, " Bulls coach Tom Thibodeau said.
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