In organic chemistry, pyruvic acid plays an important role.

His father fell into a persistent vegetative state due to a traffic accident.

It is important for us to respect cultural diversity and understand each other's differences.

The study of filterable pathogens is an important part of virology.

She was diagnosed with polycystic ovary syndrome.

He planed the wood and made a model airplane.

Restoring this old house is a tough job.

The International Workers' Association is historically an important organization.

The mammoth is an extinct large mammal.

He is the lord of this region.