He was standing on both feet.

The use of fossil fuels is causing global warming.

This service is not free of charge.

We want to nurture this mutual love carefully.

If you pay with a credit card, a transaction fee will be charged.

Both of my parents are doctors.

Ryou is my best friend.

I had lunch with my colleague.

My dormitory is close to the school.

My university dormitory is very convenient.