过去是一个陌生的国度；那里的人们行事方式不同。
The past is a foreign country; they do things differently there.
物体的加速度与所受的合外力成正比，与物体的质量成反比。加速度的方向与合力的方向相同。
The most important challenge facing the world today is the need to create strong, effective, and accountable states in the developing world.
The greatest innovations are often the simplest.
The best way to predict the future is to create it.
A mathematician's work is never done; there are always new questions to explore and new mysteries to uncover.
没有什么能阻挡一个拥有正确心态的人实现目标；世界上没有什么能帮助一个心态错误的人。
人类大脑是进化的产物，人类心智也是如此。
The architecture of a system determines its behavior more than the content of its knowledge.