3.当我看到浪费一杯水的人时，我就会想到地球上那些连水都喝不上的人。
When I see someone wasting a glass of water, I think of those who don't have water on Earth.
We are all haunted by the ghosts of our own pasts, and sometimes, by the ghosts of others.
If you want to be the best, you have to do things that other people aren’t willing to do.
The book is a mirror: if an ape looks into it, an apostle is unlikely to look out.
判断两个λ表达式是否等价的问题是无法解决的。