Sometimes, stone tools are continually modified and keen attention to surfaces is necessary to recognize each stage of the manufacture process.

Electronic information flows instantaneously from one computer system to another and may be continually modified.

Science and technology have continually modified human existence.

Castles were still used as living quarters until the 19th-20th centuries, and so were continually modified.

During its extensive test career, it was continually modified.

That building remained in operation until 1992 (though it had been continually modified and added onto), when the current facility was opened on 3679 "G" Road.

This code was continually modified, being passed around from person to person.

Science and technology have continually modified human existence through the engineering process.

In this look at the American identity, he analyzes how the historical record is continually modified by the concerns of the moment.

This new system was modified continually until circa 1980.