Don't worry, everything will be alright, we will solve it soon.

After all, he is my best friend.

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

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.

As the saying goes, 'spare the rod and spoil the child', if you pamper them, children will not grow.

He straightened his drooping tie.

I mailed a letter at the post office.

The origin of the name Asahi means the rising sun.