文学是人类的记忆。

I think the best movies are the ones that make you think, that challenge you.

我们必须在能源需求和环境保护之间取得平衡。

In computer science, we often have to deal with systems that are too complex to understand all at once.

废物只是我们尚未学会珍惜的资源。

If you can't fly then run， if you can't run then walk， if you can't walk then crawl， but whatever you do you have to keep moving forward.