引力的存在是最明显的实验事实,但从理论角度来看,它是最神秘的力量。
"The purpose of computing is insight, not numbers."
我们必须平衡能源发展与环境保护,实现可持续增长。
逻辑是所有数学推理的基础。
What can be said at all can be said clearly, and what we cannot talk about we must pass over in silence.