The machine purred away quietly and the words gleamed for a few seconds on the darkened screen.

It purred away, the print head moving fast, back and forth across the paper.

Outside a car engine revved up and purred away into the night.

The engine had stopped but when he turned on the ignition it purred away as sweetly as ever.

Five minutes later, he darted through an alley and came out on the street where the silent engine of the Dusenberg purred away.

Finally, he set the pontoons for a water take-off and purred away into the darkness.

Otho slid behind the wheel, the powerful machine purred away.

He purred away as if running off forever.

The car purred away and Kelly relaxed in his seat.

The engine started up and the car purred away down the drive.