Quality should never be compromised for the sake of quantity.
Every mathematical problem has a solution; it just takes time and effort to find it.
I never look back. I look forward to the next challenge.
所有老年人共享的大秘密是,你在七八十年里真的没有改变。你的身体改变了,但你一点也没变。当然,这会引起很大的困惑。
世界是一面镜子,反映出我们选择看到的东西。