The system has been running from many years, but was heavily modified in 2007.
The river was heavily modified in the first half of the 20th century.
It was heavily modified in the 17th and 19th centuries.
It was heavily modified and enhanced over the year of development to support the new game.
They may also heavily modify software or hardware of their own computer system.
The game requires the player to play as the humans, but they can be heavily modified.
That's a lot of money for a Mustang, no matter how heavily modified.
The 330's design was refined and heavily modified, resulting in the Short 360.
After the 1979 season, Turn of the Century was heavily modified.
The habitat in which it is found has been heavily modified for agriculture.