Since Pettitte's fastball was moving, he constantly pumped it inside on right-handed hitters while mixing in some curveballs and changeups.

"He's constantly pumping people up."

By constantly pumping antibiotics out of the cell, bacteria can increase the concentration of a given antibiotic that is required to kill them or inhibit their growth when the target of the antibiotic is inside the bacterium.

Modern non-nuclear submarines are potentially stealthier than nuclear submarines; a nuclear ship's reactor must constantly pump coolant, generating some amount of detectable noise.

In the reactor department, the carrier's constantly pumping heart, which powers the ship, purifies its water and generates its electricity and the steam for the catapults that launch the aircraft, a sexual revolution of sorts is being waged.

At an arcade, you are constantly pumping the machine - that's now more like a casino atmosphere.

The old adrenalin was constantly pumping.

Mr. Sununu was said to have countered that taxpayers have been constantly pumping new money into the airplane, which first flew in the late 1960's but has been steadily upgraded.

A nuclear submarine, however, such as Cheyenne or Han number 402, had to constantly pump reactor coolant in order to keep the reactor critical and prevent its overheating.

In a fashion not totally unlike that of pipe organs, reed organs generated sound by forcing air over a set of reeds by means of a bellows, usually operated by constantly pumping a set of pedals.