He is a professor of algebra.

This is a once-in-a-lifetime opportunity.

The Phanerozoic eon is the most recent eon in the history of the Earth.

Yoshitoshi is my best friend.

We should always remember the power of Kannon in difficult times.

He comes from a lineage of hereditary feudal lords.

I achieved a big success.

The real pleasure is made using the whey that comes out in the process of making cheese.

It's difficult to write an essay on this topic.

Do you understand the importance of this project?