He is troubled by his obsession.

This building needs reinforcement.

Relaxed education is important for nurturing children's creativity.

He studied abroad in America to receive higher education.

All of my parents and siblings are healthy and happy.

He is using binoculars to observe birds.

He was hospitalized due to pleurisy.

He said, 'If you want to shoot a man, first shoot his horse,' and began to solve the smaller problems first.

He is an expert in primatology and is engaged in the study of gorilla behavior.

A mute swan was swimming in the park's pond.