He is treasuring and preserving old photos.

A phonon is a physical concept that represents the vibration of a crystal lattice.

He will never forget that special favor.

I live in Ontario.

Please turn on the air conditioner to lower the room temperature.

She decided to separate herself from him by a great distance.

This apple weighs about 5 ounces.

Kunminjōon is a book for teaching the correct pronunciation of Hangul.

This character sound is difficult, isn't it?

The tauon plays an important role in particle physics.