The earth gives us coal; our duty is to give back stewardship.
我希望我的读者能感到他们并不孤单。
对黑洞的研究将我们带到了理解的边缘,在那里已知的物理定律失效,新的理论必须出现。
Mathematics is not about numbers, equations, computations, or algorithms: it is about understanding.