The coexistence of humans and nature is important for the future of the Earth.

He received a threat letter.

In the midst of the war, people were crying out in agonized despair.

He is troubled by his obsession.

This building needs reinforcement.

Relaxed education is important for nurturing children's creativity.

My father serves as the president of the mutual aid society.

Bats use echolocation to fly around in the dark.

This is my first time crossing the border.

He is working at a school as a student teacher.