We need to calculate the harmonic mean of this dataset.

The latest research results from NASA have been announced.

They opposed the plan in concert.

My daughter goes to the nursery school every day.

Bioweapons are a major threat to humanity.

The children were playing by beating the pellet drum.

I am planning to go to school tomorrow.

He sacrificed his time for the team.

This silkworm produces beautiful silk.

Physical education is my favorite class.