He is an expert in molecular biology.

Octans is one of the constellations in the southern hemisphere.

The water of this river is muddy.

The result of the game is fifty-fifty.

I am studying a foreign language.

Scientists are advancing research on nuclear fusion.

Learning Japanese honorific language is difficult.

This picture has a blue pentagon drawn on it.

I am majoring in linguistics at university.

The traffic light turned red, so I stopped crossing the street.