定义就是限制。

My idea of heaven is a great big baked potato and someone to share it with.

"The most important thing is to stay optimistic."

The more acute the experience, the less articulate its expression.

A proof is a device for convincing someone else that a mathematical statement is true.

译文：年轻的时候读书并没有取得深刻的理解，到了晚年的时候并没有付出多大努力却取得了惊人的成就。赏析：不管读书还是做事，我们要尽量做好，即使当时不理解，迟早有一天会明白其中的道理。年轻时不理解，是因为我们的社会阅历和人生经验不够丰富。

Corporate social responsibility is not a burden, but an inherent requirement for sustainable development.