常用 (cháng yòng): commonly used

This Chinese character is very commonly used.

Mobile phones are one of our most commonly used tools.

This word is not commonly used, so I don't know it.

The teacher taught us some commonly used sentences.

This is a commonly used word.

Mobile phones are commonly used communication tools.

This software is very commonly used; you can try it.

I have learned five hundred commonly used Chinese characters.