麦克斯韦方程式不足以设计电动机不是计算机的错。
It is not the computer's fault that Maxwell's equations are not adequate to design the electric motor.
The future of liberal democracy depends on its ability to adapt to new challenges and to maintain the support of its citizens.
The goal of economics is to understand how to allocate scarce resources in the most efficient way possible.
一个人最危险的敌人是他自己的口舌。
The only limit to our realization of tomorrow will be our doubts of today.