Sustainable quarrying isn't an option; it's our obligation to future generations.
Mathematics is not just about numbers, equations, computations, or algorithms: it is about understanding.
你受到的约束越多,你就变得越有创造力。
做你自己的事,不要在意别人是否喜欢。
The only service a friend can really render is to keep up your courage by holding up to you a mirror in which you can see a noble image of yourself.
商业中最危险的一句话是"我们一直都是这样做的"。