任何圆的面积等于一个直角三角形，其中一条直角边等于半径，另一条等于圆的周长。

历史不仅仅是关于过去；它也关乎现在和未来。

The best managers acknowledge and make room for what they do not know—not just because humility is a virtue but because until one adopts that mindset, the most striking breakthroughs cannot occur.

育儿不是追求完美，而是建立联系。