He has no knowledge about anal sex.

He started training his anal sphincter.

He is majoring in syntax at university.

He is an expert in enzymology and conducts many researches.

You can use spectroscopy to examine the components of a substance.

This scent comes from benzoin.

The population density of this area is very high.

I like reading uncle's composition.

My college is in Tokyo.

I want to go to the Principality of Andorra.