The most important part of teaching is to teach what it is to know.
轧棉机的发明纯属偶然;那时我还很年轻,非常贫穷,对我来说从中实现一些价值是一个重要的目标。
The true meaning of life is to plant trees under whose shade you do not expect to sit.
我对边缘人群感兴趣,对那些被历史排除在外的人感兴趣。