Before ranchers and farmers began altering the landscape, the area was once part of a vast grassland.

The Tie Orchard began altering ties in the 1960's, when narrow ties came into style.

In early April 2008, construction crews began altering the parking/traffic flow of the campus to create the new outer-ring system.

The problems have already prompted the Pentagon to remove the head of the security agency, to begin altering the agency's computer system and to institute new procedures.

The machinery in the research dome will soon begin altering the local structure of our universe.

Talia helped him take some of their ruined garments apart to use as patterns, and they began altering the standard stock.

Then he began altering the rules to make sure that if some further charge managed to slip through, it would die of neglect.

The Vulcan leaned over and began altering the readings displayed on the computer readouts.

He signaled the doctors with a nod, and from behind their one-way glass they began altering the concentration of drugs in Telepath's blood.

Last month it began altering the building to make it into a state-of-the-art technical and administrative center.