He was making an unusual effort to concentrate his attention on his duties.

Although the center has been open only five months, it is already being used in an unusual joint effort by some long-time antagonists.

The meeting worked, and Carry On made an unusual effort at lunch to cheer along.

This is an unusual public effort for a new aircraft that will only be built if manufacturers and airlines believe they can profit from it.

The campaign is an unusual joint effort of the Mobil roster agencies.

It implies an unusual effort as the cause of his fame.

Scenes are included here from two of her more unusual efforts.

He has undertaken several unusual efforts in the current drive.

It is certainly one of her more unusual efforts.

But there is an unusual, $17 million effort afoot to increase that number.