The SI system is a standard unit system used worldwide.

My uncle is a famous zoologist.

He is a world-renowned ichthyologist.

I use a tram for commuting every day.

My brother is a famous biologist.

It is rumored that he is a member of a secret society.

The tachometer of my car has broken.

My dream is to go to France someday.

Makoto is my best friend.

He set the coffee cup on the table.