Transition elements play an important role in chemical reactions.

It is important to understand the importance of health.

The chord progression of this song is very unique.

His explanation was impossible to understand.

The speed of this progressive wave is close to the speed of light.

Tanaka-san, have you finished the report?

Mr. Ue is my best friend.

I had a picnic at Ueno Park.

I had a picnic at Ueno Park.

In ancient documents, the word '上' was used to refer to gods.