The warriors fired a volley of arrows all at once.

Air pollution is having a serious impact on the health of the planet.

The place of articulation is a very important concept in phonetics.

The living standard of the middle class is positioned between the poor and the wealthy.

His story, after a caesura, started again.

The potential energy of this ball is proportional to its height.

His usual location is the seat at the very back of the library.

I am an Earthling.

We are searching for extraterrestrial life.

The process of terraforming is part of transforming other planets into a habitable environment for humans.