He is learning karate for self-defence.

Single-celled organisms have the most basic form in the biological world.

He is suffering from poverty.

I think there is a contradiction in his story.

He threw a net to catch fish.

The long-awaited movie has been released.

Sexual assault should never be tolerated.

I am majoring in cytology at university.

The shortage of water is a serious problem in this area.

Cone cells are the main visual receptors for recognizing colors.