She is my sworn younger sister, always supporting me.

I plan to go to the tax office tomorrow.

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

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.

He likes to take a walk in the park at dusk.

He is known for making impartial judgments.

He is known for making impartial judgments.

He is known as a comic character.

His room is always gloomy, and it somehow makes me sad.