最可持续的建筑是已经建成的建筑。

The unity of mathematics is not an illusion but a reality waiting to be uncovered.

It is only through enforced standardization of methods, enforced adoption of the best implements and working conditions, and enforced cooperation that this faster work can be assured.

每一次实验，即使失败，也会教会我们一些宝贵的东西。