"You've put a real constraint on the ways you can get gold into the rock."

The Soviets, despite very real constraints on their budgets, recognize that major growth in space prowess requires human presence.

This, of course, is no real constraint at all.

There seems to be no real constraints on people's willingness to hurt somebody else.

Technology for efficient processing of inputs - among them energy - is thus the real, long-term constraint.

That increase is a real constraint on the Fed.

"The real constraint on fiscal policy is that you can't take more than 100 percent of future income."

The only real constraint is that each side must have no more than 1,700 to 2,200 warheads at the end of 2012.

It is true that there are real constraints on how much the administration can have of both guns and butter.

As opposed to the office sector, you have a real constraint on supply.