采石业必须与技术一起发展，否则就有落后的风险。

最好的故事是那些同时触动心灵和思想的故事。

I'm very proud to be black, but black is not all I am. That's my cultural historical background, my genetic makeup, but it's not all of who I am nor is it the basis from which I answer every question.

In computer science, we often deal with problems that are easy to state but hard to solve.

天地有万古岁月，可人死了就不会再复活；人寿命最多百年，一天很容易就会过去了。