I am majoring in biology at university.

Carbohydrates are important as a source of energy.

I prefer cash transactions.

His painting is very good at model drawing.

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

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.

He is majoring in zoology at university.

This building has existed for centuries.