Climate change and overfishing are twin threats we must tackle together.

这朵花藏在它那绿茵茵的房间中用了很长的时间来打扮自己。她精心选择着她将来的颜色，慢慢腾腾地妆饰着，一片片地搭配着她的花瓣，她不愿象虞美人那样一出世就满脸皱纹。她要让自己带着光艳夺目的丽姿来到世间。

If you don't design your own life plan, chances are you'll fall into someone else's plan. And guess what they have planned for you? Not much.

每个数学问题都有解决方案，但并非每个解决方案都显而易见。

对黑洞的研究彻底改变了我们对空间和时间的理解。