The reactor crisis in Japan may have its roots in a cascading series of events, but the most intractable parts stem from decisions, or lack of them, about what to do with the spent fuel rods.
Incapable of accepting any compromise, he described himself as a most intractable character.
Either way, the rush of results is expected to lend fresh insights on the strong force, widely considered among the most opaque and intractable parts of the Standard Model, the theory physicists use to explain matter's basic structure.
The police officer's cellphone -- which links her to 24-hour translation service in 150 languages -- is part of a new effort aimed at one of the city's most intractable criminal justice problems: domestic violence among immigrants.
It was an early and foundational contribution from Britain to the world's most intractable conflict.
Knight promised to solve Tupac's most intractable problems.
But the most intractable problem of all remained the economy.
The conflict is one of Asia's most intractable.
The setting was chosen in part, they said, to showcase the relative success of the peace effort in Northern Ireland, which was once considered to be one of the world's most intractable conflicts, as a lesson for the Middle East.
Heroin is among the most immediate — and the most intractable — social, economic, and political problems.
Poems inspired by the underworld of myth confront our most intractable fears.
