数学之美不仅在于它描述世界的能力，还在于它揭示支配世界的隐藏结构的力量。
The beauty of mathematics lies not only in its ability to describe the world but also in its power to reveal the hidden structures that govern it.
Sometimes we measure things and see that in the short term they actually hurt sales, and we do it anyway.
力气单薄就不要去背负重物，说话没分量就不要规劝别人。