死者从未远离我们。他们在我们心中,在我们脑海里,在我们周围。
Mathematics is not about numbers, equations, computations, or algorithms: it is about understanding.
如果你想发展,就必须愿意适应变化。
古代著书立说的人,都是有所为而发的。
In mathematics, truth is somewhere out there in a place we don’t yet know, and the only way we can hope to find it is by exploring.