The most important political distinction among countries concerns not their form of government but their degree of government.

The principles of conditioning apply equally to all species.

在数学的世界里，每个问题都会引出另一个问题，创造出一个连接所有科学领域的无尽知识网络。

The more you give, the more you get.

The best technology is invisible—it just works seamlessly.