Philosophically speaking, time and space refer to the two most basic characteristics of the world we live in: time and space. They are interdependent, interactive and intertwined.
Physically, spatio-temporal structure refers to a set of mathematical models and equations that describe the law of the development of the universe, including matter, motion and interaction.
Among them, special relativity mainly describes the physical laws of relative motion, while general relativity expands these laws, explains the complex relationship between matter and gravity, and introduces the concepts of curved space and space-time bending, so that we can better understand all kinds of strange phenomena in the universe.
Generally speaking, space-time is the basic concept of human understanding of the universe and its position, and it is one of the key elements in exploring nature.