He was born as an illegitimate child and experienced many difficulties.

My grandfather used to till his privately-owned rice field.

He holds a personal grudge against me.

Using the private railway makes commuting very convenient.

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.

This new jet can fly at supersonic speeds.