Today is my unlucky day, so I think it's better not to do anything.

He finished his work in a short time.

He is working as the U.S. ambassador stationed in Japan.

Hinatama is my best friend.

He was swimming freely as if he was a fish playing in the pot.

He is undergoing training for extravehicular activity.

He engaged in an extravehicular activity from the spaceship.

He is a foreigner, but he can speak Japanese fluently.

I have been to Outer Mongolia.

Coitus interruptus is one method of contraception, but it is not completely reliable.