Chemotransmitters play an important role in the transmission of information between nerve cells.

Sufficient caution is necessary when handling radioactive materials.

He is a person of strong vanity who reads self-improvement books.

I think an amendment to the law is necessary.

There is a need to amend the law.

There is a clear duality in his character.

It has become the year 2022 in the western calendar.

My younger sister is participating in the church choir.

The explosion of a supernova is one of the brightest events in the universe.

He is majoring in embryology at university.