尝试一种方法是常识。如果失败了，坦率地承认并尝试另一种方法。但最重要的是，尝试一些事情。
It is common sense to take a method and try it. If it fails, admit it frankly and try another. But above all, try something.
如果我们想养活世界，就必须投资于更智能的畜牧方式。
She walks in beauty like the night,Of cloudless climes and starry skies;All that's best of dark and bright，Meet in her aspect and her eyes.
永远不要停止质疑，即使答案似乎已经确定。
唯一真正的发现之旅不在于寻找新的风景，而在于拥有新的眼光。
To lose one parent may be regarded as a misfortune; to lose both looks like carelessness.