He is a renowned criminologist who has contributed to many crime analyses.

He is known as an expert in criminal investigation.

He is known as an expert in criminology.

He is majoring in criminology at university.

His actions were considered criminal.

He drew a triangle shape.

Glutamine is an important amino acid for muscle recovery.

The old-fashioned baby carriages were significantly different from the ones we have today.

She was spinning wool on a spinning wheel.

I have started learning Hangeul.