我们养殖的每一条鱼,都意味着少从野外捕捞一条。
I'm mentioning all this -- I'm mentioning all this because I think this is not merely a personal problem; you may think I'm wrong in this, but I think we live in an age when our lives are regularly punctuated by career crises, by moments when what we thought we knew -- about our lives, about our careers -- comes into contact with a threatening sort of reality.
Mathematics is the art of giving the same name to different things.
Success comes from persistence and hard work.