"Memory is like a dog that lies down where it pleases."
记忆就像一只狗,它喜欢躺在哪里就躺在哪里。
"Life is what happens when you're busy making other plans."
The best time to plant a tree was 25 years ago. The second best time is today.
In mathematics, the art of proposing a question must be held of higher value than solving it.