higher string topology

现代物理学由两个久经考验的理论组成：量子力学和广义相对论。量子力学解释了粒子的行为，而广义相对论解释了行星、恒星和星系等大物体的运动。两者都非常擅长在特定情况下预测自然。例如，广义相对论在任何观测证据出现之前就预言了黑洞的存在。然而，量子力学只有在引力弱到可以忽略的情况下才有效。同样，广义相对论也不能解释电子等非常小的物体之间的相互作用。但既然行星和电子生活在同一个宇宙中，它们应该遵循同样的自然法则。因此，物理学家一直致力于建立一种既包含量子力学又包含广义相对论的理论。这个理论应该能相容地解释行星的运动和核物理。

Modern physics is composed of two well-tested theories : quantum mechanics and general relativity. Quantum mechanics explains the behavior of particles while general relativity explains the movement of big objects as planets, stars and galaxies. Both are extremely good at predicting nature in specific circumstances. For example general relativity predicted the presence of black holes before any observational evidence. However, quantum mechanics only works when gravity is weak enough to be ignored. Similarly general relativity cannot explain the interactions of very small objects as electrons. But since planets and electrons live in the same universe, they should obey the same laws of nature. Hence physicists have been working towards a theory that encompasses both quantum mechanics and general relativity. This theory should explain compatibly the movement of planets and nuclear physics.