This factory is our main source of supply.

My dream is to visit the Portuguese Republic.

He is undergoing psychotherapy to overcome anthropophobia.

That battlefield was truly a hell of agonizing cries.

He is reading the daily scripture.

He read the small print using a magnifying glass.

The study of phonons is an important field in physics.

I used binoculars to observe birds in the mountains.

He joked around and used vulgar language.

He was observing the distant birds using binoculars.