The engine is idling.

This area is very quiet.

He raised his hand and asked a question.

This round shape represents a perfect circle.

He spent the whole day trying to solve the problem.

My father is the captain of the 'Hamabe-maru'.

Mr. Maru is my best friend.

My name is Tanaka-maru.

Maru, where are you going?

That apple is plump and looks very delicious.