His attitude was threatening, and I became scared.

That movie was really touching.

This door opens automatically.

This village really has an idyllic landscape.

The steepest descent method is one way to solve optimization problems.

The Security Council is the main organization for maintaining international peace and security.

The National Security Council was convened to make important policy decisions.

The calculus of variations is a branch of mathematics that deals with the optimization of functions.

He is studying at law school.

The fire alarm went off, so we immediately evacuated the building.