Each tax change would pull triple duty by raising revenue, reducing dependence on foreign oil and helping the environment.

In Ayacucho the hair salon serves triple duty as a telephone booth and a lawyer's office.

The triple duty is grueling, but at least Hinson never wonders if the Nets need him.

On a ship with no extra mass and very little room, every machine had to serve triple duty.

"Genes often do double and triple duty, or more."

He was not doing triple duty, after all, which would have been impossible.

Flexibility is increased because the hand-held computer can do double or triple duty: in the car, at the office, at home.

For weeks he had been doing triple duty, as a doctor, disease researcher, and interim hospital administrator.

My entire gang will be on triple duty.

Everyone has to do double and triple duty.