There is a small gap in the wall.

The doctor told him that there was fluid accumulating in his thoracic cavity.

The enemy army made an air raid on our base.

Last night, our town was hit by an air raid.

Momoka is my best friend.

In physics, time and space are closely related.

This experiment is conducted in a vacuum.

The aerial bombing destroyed most of the city.

They bombed the enemy's city from the air.

We send important goods by air transport.