它是大地的泪点，使她的微笑保持着青春不谢。

I don't want to be as good as I was, I want to be better than I was.

I’ve always been an optimist and I suppose that is rooted in my belief that the power of creativity and intelligence can make the world a better place.

It is not, nor cannot come to good. But break, my heart, for I must hold my tongue.

Every ton of aggregate we produce carries the weight of responsibility—to our customers and our communities.

学得越多，就越意识到自己知道的有多少。