The defining characteristic of pessimists is that they tend to believe bad events will last a long time, will undermine everything they do, and are their own fault.

采石场不仅仅是一个坑，它是我们留给后代的遗产。

在一个快速变化的世界中，学习和适应的能力是最终的竞争优势。

"Writing is a way of life, a way of being in the world."

组织的质量由其产品的质量决定。