The best way to learn mathematics is to do mathematics.

不承认公民权利的社会注定要衰败。

And America, too, is a delusion, the grandest one of all. The white race believes—believes with all its heart—that it is their right to take the land. To kill Indians. Make war. Enslave their brothers. This nation shouldn’t exist, if there is any justice in the world, for its foundations are murder, theft, and cruelty.

Quality is the lifeline of the enterprise. We always adhere to high standards and strict requirements to ensure that every piece of stone can stand the test of time.