Nuclear fission is a powerful process that generates energy.

He is an expert in nuclear physics.

He said 'friend' as a noun ending for me.

I often go to the cinema on weekends.

Life is a series of ups and downs.

I want to go see a Broadway musical.

Life is a series of vicissitudes.

The history of the British Empire occupies a particularly important part in world history.

The artificial satellite is orbiting around the earth.

The study of nekton is an important part of marine biology.