有时候你做了所有正确的事情，事情仍然会出错。关键是要永远不要停止做正确的事情。
Sometimes you can do everything right and things will still go wrong. The key is to never stop doing right.
"The artist must be the conscience of his time."
The concept of probably approximately correct (PAC) learning has been foundational in computational learning theory.
能源的真实成本必须同时考虑其生产和遗留影响。