数学研究是所有自然现象精确知识不可或缺的基础。
I'm interested in the way we see things, which is always changing.
粮食安全是一个需要地方行动的全球性问题。
成为一个艺术家就是要不断地质疑。
As you grow older, you will discover that you have two hands, one for helping yourself, the other for helping others.