The police were desperately trying to defuse the time bomb.

The police found a dirty bomb and immediately reported it to the experts.

This bottle is reusable.

Who is the user of this software?

He is the most competent employee of our company.

Are you really not going to use this unused laptop?

The study of nucleons is an important field in science.

Nuclear fusion is expected to be a future energy source.

The cell nucleus holds genetic information.

It is reported that North Korea has conducted another nuclear bomb test.