When the alarm clock rang, I immediately jumped out of bed.

My biological clock is completely messed up.

He found an ancient fire clock.

He measures time accurately using an atomic clock.

There is a new radio clock in my room.

He looked at his pocket watch and checked the time.

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

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

Using the private railway makes commuting very convenient.

We respect Japanese culture.