He is in charge of the movie projection.

He spent time copying the old documents by hand.

He copied the old letter by hand and preserved it.

I am planning to go to Gangwon in Korea next week.

This radio is emitting music.

He is the most famous rich man in this town.

This area is affected by radioactivity.

He is receiving treatment for brain radiation.

Demography is an important tool for understanding various aspects of society.

He is an expert in fiber optics.