The sound of a gun's fire shattered the silence of the night.

This factory produces a large amount of products every day.

He belongs to the elite unit of the company.

He is known as the pick of the team.

I studied as hard as I could to pass the exam.

The structure of the vocal tract is very important in forming human voices.

She has a pure heart.

His natural voice is much more beautiful than the recording.

He contributed to many charitable activities during his lifetime.

I have been to Xining in China.