The theory of black body radiation is an important part of physics.

After the fire, black smoke was hanging in the sky.

He is dark-skinned, suitable for working under the sun.

He used to be a member of the Chinese gang.

I have visited the Yellow Crane Tower.

A beautiful demoiselle crane visits my garden.

Shizuruka is my best friend.

Shizuruka is my best friend.

I visited the Yellow Crane Tower in Wuhan, China.

I enjoyed fishing at Tsurumine Lake.