One thing that has characterized the helicopter since its invention in the 1930s has been the absurdity of the machine.

An emphasis on public health and preventive medicine has characterized Chinese health policy since the early 1950s.

This is because the city has historically been characterized by spiritual Awakening since the 1860s.

Religion in China has been characterized by pluralism since the beginning of Chinese history.

It's a pattern that has characterized our storms since at least the mid-70s.

Both artists are showmen whose work reflects the heightened awareness of audience, the increased accessibility that has characterized so much art since the late 1970's.

Fierce land and sea battles had characterized the fighting since the early going.

Composition research has been characterized since the beginning by its diversity, drawing on several fields of study and many methods of investigation.

No one put more clearly the shift toward a reliance on the image that has characterized the century and a half since the introduction of photography.

Nevertheless, the calm that has characterized foreign-exchange markets since early in the year is having an effect on international investors.