Tomorrow's flight has been cancelled as planned.

Tomorrow's flight has been cancelled as planned.

Believing that failure is a stepping stone to success, he challenged again.

Believing that failure leads to success, he continued to challenge himself over and over again.

He is a perfectionist, so he is very strict about his work.

He played a perfect fifth scale on the piano.

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.