He spurred himself on to achieve his ambition.

He was able to gain knowledge through hard work.

He started drawing a picture on the white paper.

Hōki was an ancient place name in Japan, located in the eastern part of present-day Tottori Prefecture.

His performance was strikingly realistic.

The grey matter of the brain is the central part of information processing.

The white matter in the brain plays a role in transmitting signals of nerve cells.

You must not cross the white line.

Everyone in the audience clapped for his wonderful performance.

A white dwarf is a celestial body that a giant star becomes at the end of its life.