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

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

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.

He went to America as an international student.

He is working at a school as a student teacher.

That high school girl studies in the library every day.

My grandfather is good at repairing old pendulum clocks.

The owl is hooting in the night forest.