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.

Everyone, please have a good new year.

He gave me the cold shoulder.

He was able to find a solution from a difficult situation.

He said, 'See Naples and die,' and went on a trip to Italy.

I was surprised by his shabby clothes.

I came, I saw, and I won.

He was gazing at the distant mountains.