He was wearing a red belt.

We should cherish our freedom.

Her absolute territory caught my eye.

In Magic: The Gathering, you can place cards in the command zone.

We should save electricity for energy conservation.

We should increase the use of alternative energy to protect the earth.

The potential energy of this ball is large because it is in a high position.

The potential energy of this ball is proportional to its height.

Ionization energy is the minimum energy required for an atom or molecule to lose an electron.

This park is an energy spot for the local people.