船在港口是安全的,但那不是船被建造的目的。
A ship in port is safe, but that's not what ships are built for.
年轻人不知道什么是谨慎,因此他们尝试不可能的事情——并且一代又一代地实现了它。
Mathematics is the key to unlocking the secrets of the universe and understanding the fundamental laws that govern it.