The Demon Core is a very dangerous substance.

I have been to Monrovia.

He is an expert in hydrology, and his research is highly valued around the world.

He is an expert in hydrology and is conducting research on flood prevention.

In phonetics, glottal sounds are produced by the movement of the vocal cords.

During the monsoon season, it rains a lot.

The blue-ringed octopus is a very dangerous creature, its venom can kill a human.

Limoncello is a traditional Italian liqueur.

He was turned away at the gate of that restaurant.

He is totally illiterate and cannot read characters.