If you're not stubborn, you'll give up on experiments too soon. And if you're not flexible, you'll pound your head against the wall and you won't see a different solution to a problem you're trying to solve.
作家是国家的天然敌人，因为国家建立在谎言之上，而作家建立在真相之上。
I believe that we are lost here in America, but I believe we shall be found.
译文：人生得一知己必须要对知己问心无愧，读书人多读书，一定要学以致用。赏析：做人做事凭着良心方能服众，才不会招致怨愤和祸患。读书的目的就是学以致用，我们不能读死书，死读书，我们要让书中的知识来指导我们的生活。
The path to decarbonization is complex, but the cost of inaction is far greater.
The desires， and other passions of man， in themselves， are in his own power； his real difficulties are， to know when they are to be controlled， and when not.
黑洞防火墙的概念挑战了我们对量子力学和广义相对论的理解。