数学不仅仅是关于数字、方程、计算或算法：它是关于理解的。
Mathematics is not just about numbers, equations, computations, or algorithms: it is about understanding.
Free education is abundant, all over the Internet. It's the desire to learn that's scarce.
海洋养育了数百万人，我们有责任确保它能为子孙后代继续这样做。
我非常钦佩那些无所畏惧并追求自己想要的女性。