His painting expresses pure beauty.

This biennial plant matures and blooms over the course of two years.

The students on a field trip visited the museum.

He was hiding the fact that he was an illegitimate child.

The ecosystem of zoobenthos is an important field of study in marine biology.

The study of benthos is an important field in marine biology.

Phytobenthos is an important part of the marine ecosystem.

He arrived in Tokyo yesterday.

He was observing the distant birds using binoculars.

English is widely used as a common language in the world.