He is working himself to the bone in pursuit of his dream.

There were many whirligig beetles swimming in the pond.

A water spider can walk on the surface of the water.

A whirligig beetle is swimming in the pond.

Albumin is one of the important proteins in our body.

The fourteenth chapter of The Tale of Genji, Mio-tsukushi, is a very moving chapter.

He drove the boat relying on the channel marker.

Fire and water are considered opposing elements.

We performed a purification ritual at the shrine for the New Year.

He is reading a book about ancient chemistry.