美国是唯一一个直接从野蛮进入颓废、中间没有经过文明阶段的社会。

Spend as much time crafting the subject line of an email as the message itself because the subject line is often the only thing people read.

The social responsibility of an enterprise is not just to make profits, but also to give back to society.

科学不仅仅是一门学科，它是一种思维方式。