This project will have a perpetual impact.

Tridymite is a mineral that is formed at high temperatures.

He is not a perfect hero, but rather like an antihero.

This restaurant is open now.

We are planning to go camping out this weekend.

We decided to camp out in the mountains.

He is learning karate for self-defense.

He is good at backstroke.

He commanded the vanguard in that war.

This triangle has two acute angles.