Our current understanding of physics is powerful and accurate, as far as it goes, but it is not as beautiful and coherent as it should be. We have separate equations for four forces: strong, weak, electromagnetic, and gravitational.
迄今为止，我们当代的物理学知识相当有力、准确，但它还没有达到它应该达到的完美与一致性。我们有不同的方程组，可以分别描述 4 种基本力：强作用力、弱作用力、电磁力和万有引力。这个有待统一的庞杂系统令人回想起麦克斯韦之前电磁学方程的零散状态。