He was staring fixedly at a certain machine near the wall.

Some of the Amish people in other places are learning to use certain machines now, to make farming better.

A certain machine knew his face, at any rate.

"We can't dodge till a certain machine has been fixed."

We do mostly an experimenting business here, making only one or two of a certain machine.

For security reasons only certain special machines, such as the centrifuges in the sugar house, are decentralized.

Tom shook his head, certain the machine had been programmed to do this now and again.

You have here a certain great machine established by your ancestors.

Suppose we used the negative binomial distribution to model the number of days a certain machine works before it breaks down.

"She discovered that papers come out of a certain machine in your office," Val said, her voice wry.