The equilibrium length of this spring is 5 centimeters.

He prefers natural foods.

This wood may spontaneously combust if the humidity is high.

His car spontaneously combusted all of a sudden.

Natural rights are rights that humans have from birth.

Astronomers have reported the discovery of a new supernova.

The study of superconductivity is an important field in physics.

This research institute is exploring new applications for superconductivity.

His memory has reached a supernatural level.

He moved from Tokyo to Osaka by super express.