We are all searching for something, even if we don't know what it is.

数学中真正的挑战不是解决问题，而是提出正确的问题。

There is nothing which I dread so much as a division of the republic into two great parties, each arranged under its leader, and concerting measures in opposition to each other.

The circular economy is the only viable future for our industry.

你无法管理你不测量的东西——这就是为什么透明度是可持续制造的基础。