The best time to plant a tree was 20 years ago; the second best time is now.
种树的最佳时间是20年前;第二好的时间就是现在。
化学是一门奇妙的科学,但一个人不应该完全投身于其中。
We need to think about poverty not as a monolithic problem but as a series of interconnected issues that require tailored solutions.
当我们保护海洋生态系统时,我们最终是在保护人类的生计。
最好的书留给你的问题比答案更多。
Quality should never be compromised, no matter the pressure to cut costs.
I am not a hero of mathematics. I'm not even that successful; that is why I don't want to have everybody looking at me.