随着年龄增长,你对时间的看法会改变。
The economics of gender is not a niche subject; it is central to understanding modern economies.
The definition of a good mathematical problem is the mathematics it generates rather than the problem itself.
You can‘t reason someone out of a notion that they didn’t reason themselves into. 
可持续发展不仅仅是一个流行词,更是我们对后代的责任。