He doesn't waste even a single grain of rice.

He knows nothing about that one case.

One part is important.

We should use more renewable energy.

We are using LED bulbs for energy saving.

He read the Thousand and One Nights and was drawn to the charm of the Orient.

This miniature light bulb is perfect for a small lamp.

There is an old incandescent light bulb in my room.

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

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