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.

We are going on a trip tomorrow.

He holds a personal grudge against me.

A regular polyhedron is a polyhedron where all faces are the same shape.

The cathode of this battery is made of copper.

There are more than a billion quintillion stars in this galaxy.

These two variables are in a proportional relationship.