The nucleolus, which is part of the cell nucleus, plays an important role in the production of ribosomes.

In physics, the study of the 'nucleus' at the center of an atom is important.

The cell nucleus holds genetic information.

The number of nuclear-armed countries is increasing worldwide.

The study of nucleons is an important field in science.

Nuclear fusion is expected to be a future energy source.

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

If a nuclear war occurs, humanity will be extinct.

The clitoris of a woman is very sensitive to sexual stimulation.