The deepest theorems often arise from the simplest observations.
最深刻的定理往往源于最简单的观察。
失败是成功之母。但重要的是从失败中学到什么。
城市不仅仅是一个场景，它是小说中的另一个角色。
The revolution is a long and arduous struggle, but with determination and unity, victory is certain.
我相信每一个挑战都是一个成长的机会。
粉碎资产阶级的方法是在税收和通货膨胀的磨石之间碾碎他们。
User needs are both the starting point and the end point of business.