Hydrocyanic acid is a very dangerous chemical.

Hydrogen cyanide is a colorless liquid with a distinctive smell.

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

This road is dangerous, so please be careful.

Please avoid this road because it's dangerous.

I was amazed at his extraordinary talent.

Please press this button in case of emergency.

It is a very beautiful view.

The sourness of this lemon is very strong.

He is majoring in chemistry at university.