In the last three decades, the federal government has forced school bus manufacturers to meet progressively stronger pollution standards.

As more and larger motor units are activated, the force of muscle contraction becomes progressively stronger.

His signal's getting progressively stronger, but I can't read the instruments!

The third, fourth, fifth time a criminal is apprehended for a petty crime, the penalty must be progressively stronger.

The game allows four different space craft for the player to use, each with progressively stronger weapons.

Each has progressively stronger enemies and less ammo to spare.

Since the skin reaction is an allergic one, people may develop progressively stronger reactions after repeated exposures.

As the storm moves north, the "steering winds" in which it is embedded become progressively stronger.

For this very reason, we are very happy in the Union and want to help it become progressively stronger.

But those periodic tumults grew progressively stronger as the awful flight went on.