The past is a foreign country; they do things differently there.
过去是一个陌生的国度；那里的人做事方式不同。
除非我们愿意为之而死，否则我们不能确定有值得为之而活的东西。
"The challenge of acting is to make the audience forget they are watching a performance."
保持饥饿，保持愚蠢。
We must have reverence when making products and be responsible to users.
"The challenge in AI is not just to build systems that can perform tasks, but to build systems that can learn to perform tasks."
释义：没有平地不变成山坡的，没有去了而不回来的，在艰难困苦中应坚守纯正，必然会有好的结果。