Resilience is not a trait that people either have or do not have. It involves behaviors, thoughts and actions that can be learned and developed in anyone.

Every time you lose, it hurts. But you have to get back up and keep going.

Life is short, make it sweet.

The coal industry has been the backbone of America's energy independence for generations.

关于MM定理最重要的事情不是它的现实性，而是它的简单性。