The Race Between Education and Technology is a hefty read filled with data and charts and sometimes long passages written, regrettably, in economese, which likely have been and remain rich fodder for argument among economists.
"We will respond to the threat of climate change, knowing that the failure to do so would betray our children and future generations, " he said, warning of a "long and sometimes difficult" path to sustainable energy sources in a nation dominated by its fossil fuel industries such as oil and coal.
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And the second was that the road to recovery would be long, and sometimes bumpy.
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As trades go, sometimes they are short-lived and sometimes they are long-lived.
However, communal, caste and regional tensions continue to haunt Indian politics, sometimes threatening its long-standing democratic and secular ethos.
At a stroke, this boosts businesses and cuts out the sometimes months-long lag between food aid being bought, shipped and distributed by the big international agencies.
Her first novel, "Attachment, " published in 2008, probed the poignant and sometimes comedic world of aging, intimacy and deceit between a long-married media couple across England, America and an imaginary island in the Indian Ocean.
The path towards sustainable energy sources will be long and sometimes difficult.
Her songs tell of long and sometimes desperate searches for love or a little clarity of thought or for instant solutions to life's problems.
These buyers and sellers also include ticket brokers, who as market makers put their own capital at risk over the course of the long and sometimes winding, sports seasons.
But, in order to make sure the road to low cost clean energy is long and sometimes difficult, America must resist this transition because it makes those of us in power who lost billions of tax payer dollars on subsidizing high cost alternative energy sources look stupid.
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It has sought to reimpose discipline and end the protesters' sometimes chaotic exuberance on the streets, using military tribunals and long-hated emergency laws.
In history the evidence is overwhelming: Stock market bottoms happen, and then stocks jolt upwards, while the economy keeps getting worse--sometimes by a lot and for a long time.
It requires more discipline than most people have and sometimes requires more discipline than people who have been doing it for a long time and who are considered to be professionals have.
My pupils went down for long naps, and I sometimes felt like doing the same.
The historical sources are confused and contradictory, sometimes written long after the events they describe.
Weaning ourselves off oil will be a long, expensive, and sometimes painful process.
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Grooming regimens are elaborate, he said, lasting as long as five hours and sometimes leaning heavily on hair spray and colored chalk.
In fact, the company outlined such difficulty in a newly surfaced patent, highlighting the sort of "long and awkward conversation" sometimes required to discover common interests.
Given the long history of competition and sometimes even open animosity between some from the Texas and Nashville musical scenes, it may seem surprising that this project was recorded in Nashville at all.
He climbed sometimes in skimpy black singlet and white jeans, sometimes in minute running shorts, with his long blond hair dangling as he inched across a layback or relaxed, hanging by his fingertips, for a while.
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There is a long arc to history and progress sometimes comes in unexpected ways.
Sometimes people are anticipating long lines and you get there and you said I don't have time to go home and change my shirt.
Churches have long played a hidden (and sometimes not so hidden) part in political life, from the black churches' role in the civil-rights era to Evangelical Protestant churches in Mr Bush's re-election.
Sometimes I long for the days when newspapers and magazines were the main sources of economic information for investors.
The marine is a keen walker and is known to go on very long walks, heading miles outside of the Arbroath area, sometimes venturing as far as Barry Buddon and even the Carse of Gowrie.
The crew tried to keep passengers calm as they slept on decks and waited in food lines, sometimes for as long as four hours.
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Sometimes he went for long walks around the village and even outside it, over the hills that encircled the little valley, through orchards and dusky pine groves.
Still, while its music has long been entertaining and technically impressive, it's sometimes seemed to be missing something.
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