He knocked out his opponent with a single punch.

The safe harbor rule is a law that protects companies from lawsuits by disclosing certain information.

This project was partially successful.

He always bluffs because he lacks confidence.

Writing a declaration is difficult.

Liquid nitrogen is very cold, so care must be taken when handling it.

Liquid oxygen is often used as rocket fuel.

He is a world-famous geographer.

Recently, this store has become so quiet that you can hear a pin drop.

She is wearing ethnic clothes.