Train employees well enough they could get another job， but treat them well enough so they never want to.

你或许无法改变现实，但你可以改变对现实的态度。

The study of topological phases of matter is a testament to the power of theoretical physics to predict and explain new states of matter.

作家的职责不是提供答案，而是提出能引发思考和反思的正确问题。

History is not the past. It is the method we have evolved of organizing our ignorance of the past.

解释：脚力不强劲，行程就不会远；刀刃不锋利，割东西就不会深。

系统对给定输入的响应是其历史记录的函数。