Protists are single-celled organisms that live in water.

He believes in the philosophy of materialism.

Carbohydrates are important as a source of energy.

His painting is very good at model drawing.

He has a full-size model of a dinosaur in his room.

I prefer cash transactions.

Animal experiments are necessary for the advancement of science, but there are also ethical issues.

He is learning about the handling of experimental animals.

We went sightseeing in Kyoto.

My pet is a dog.