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.

Linear programming is a part of operations research and is used to find the optimal solution.

Paying the urban planning tax is a citizen's duty.

The United Nations Environment Programme is providing solutions to global environmental problems.

Toyota Motor Corporation is one of the world's largest automobile manufacturers.

I'm sorry, but I don't speak Japanese.