That's a difficult exercise".
"It was an enormously difficult exercise," Mr. Voulgarakis said.
Still, even the boldest acknowledge that it's a difficult exercise.
We'll do that via a straightforward yet maddeningly difficult exercise.
"We would make it an extraordinarily difficult exercise".
Trying to pinpoint the level of discontent in a society is a difficult exercise.
And judges routinely tell juries to disregard testimony they have heard that is deemed inappropriate, a difficult exercise, at best.
The Ravel, like so many of his orchestra showpieces, began life as a particularly difficult exercise in piano virtuosity.
"Portraits are still a very difficult exercise," says Christian Caujolle, who launched the Phnom Penh Photo festival and curated the Lille exhibition.
Framing the aggregate impact in terms of a single number, or even irrefutably demonstrating that the net effects are positive or negative, is a formidably difficult exercise.
A few days ago, after Santana Moss had been injured, the Jets' special teams coach, Mike Westhoff, gave his punt returners a unique, and comically difficult, exercise.
