He is an expert in ring theory and has written many papers in the field.

The citric acid cycle plays a crucial role in the energy production of cells.

They built an abatis to prevent the enemy's invasion.

The cere of this bird is very brightly colored.

In our medical class, we learned about the function of the pyramidal tract.

He loves rock 'n' roll.

Nice to meet you.

He is passionate about studying computing.

He picked up the vajra staff and began to pray quietly.

My friend came from Congo-Brazzaville.