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

My personal thought is that everyone should be treated equally.

He values his private life.

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

He holds a personal grudge against me.

Using the private railway makes commuting very convenient.

At the airport, drug dogs are sniffing passengers' luggage.

My mobility dog helps me live my daily life.

Detection dogs are trained to find explosives.

Police dogs are very effective in tracking criminals.