The only limit to our realization of tomorrow will be our doubts of today.
在量子力学中，轨迹的概念失去了意义。
The greatest danger to American agriculture is the loss of the family farm.
A good mathematician is one who can see analogies between theorems; a great mathematician is one who can see analogies between analogies.
过去并未死去，它甚至还未过去。
未来，即是他者的问题。