Weekdays are usually the days to go to work or school.

The artificial satellite is orbiting around the earth.

He became obsessed with publicly-owned gambling enterprises and used up all his savings.

My father is an expert in otolaryngology.

Ununhexium is an element that is not yet fully understood.

He was wearing an old robe.

I think he is lucky.

Observing a nebula is a wonderful experience that makes you feel the mystery of the universe.

The clouded leopard is a wild animal with a very beautiful pattern.

Water transportation has been developed in this area since ancient times.