乐观主义者认为这是所有可能世界中最好的一个。悲观主义者则担心这是真的。
The truth is rarely pure and never simple.
如果没有地幔对流的概念，大陆漂移理论将只是一种猜测。
人工智能中最重要的技能是学习的能力。
译文：祖国沉沦每个人都有责任，我在天涯漂泊没有家。
I don't want to be a star who just shines on stage. I want to be an artist who touches people's hearts.
The future is not a result of choices among alternative paths offered by the present, but a place that is created—created first in the mind and will, created next in activity.
古代的人，得志时，恩泽施于百姓；不得志时，修养自身显现于世。