设计不仅仅是外观和感觉，设计关乎它如何运作。

链条的强度取决于它最薄弱的一环，而生活终究是一条链条。

——在黄埔军校开学礼演说，1924年6月16日

The most profound ideas in mathematics often arise from the simplest observations.

The past is never dead. It's not even past.

And let's be clear: It's not enough just to limit ads for foods that aren't healthy. It's also going to be critical to increase marketing for foods that are healthy.