I always try to be better than I was yesterday.
我总是努力比昨天的自己更好。
你知道的越多,你就越意识到你不知道的越多。
如果人类不能在我有生之年登陆火星,我将会非常失望。
我独处时从来不感到厌烦,闲聊才是我一辈子忍受不了的事情。
We cannot be sure of having something to live for unless we are willing to die for it.