If a nuclear war occurs, humanity will be extinct.

War takes away many innocent lives.

He spoke to the people at the assembly using a loudspeaker.

He used a loudspeaker to convey his message to a large crowd.

We went on a trip on a large passenger ship.

My worry about his health condition has deepened.

He is worried about the future.

In physics, the study of the 'nucleus' at the center of an atom is important.

They waged war against the enemy country.

Amphibole, a type of mineral, is mainly found in igneous rocks.