He looked back.

I forgot my username.

His actions destroyed his family's happiness.

Lower fatty acids play an important role in the human body.

Essential fatty acids are necessary to be taken from our diet because our body cannot produce them on its own.

Olfactory cells play an important role in allowing us to sense smells.

We decided to plant a shelterbelt to protect the crops from the wind.

He is dedicated to the study of interstitial cells.

The police are closely monitoring the activities of the motorcycle gang in town.

The Hachijō dragonfly is a unique species to Hachijō Island, and its beauty is captivating.