译文：机遇不能白白错过，好时机不会每次都来。
We may have all come on different ships， but we're in the same boat now.
抽象是管理大型软件系统复杂性的关键。
数学的本质在于它的自由。
Looking back at the 21-year-old that I was at graduation, is a slightly uncomfortable experience for the 42-year-old that she has become. Half my lifetime ago, I was striking an uneasy balance between the ambition I had for myself, and what those closest to me expected of me.