I was at a loss for words at her reaction.

This product is a parallel import.

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.

After we had a big fight, we became a stronger relationship, just like the proverb 'after the rain, the ground hardens'.

With the spirit of preparing before it's too late, he started studying a week before the exam.