The word "primitive" often appears in philosophy, science, history and other fields, and it represents primitive, primitive and fundamental significance. In philosophy, "primitive" usually refers to the root or starting point of existence; In science, "primitive" represents the most basic element or principle in a system; In history, "primitive" refers to the origin and root of an event or phenomenon. For example, "prime meridian" refers to the meridian passing through Greenwich, which is considered as the starting point of the earth and used to set universal standard time.
In addition, there are professional terms such as "primary gas", "primary substance" and "primary particle", all of which refer to the most basic elements or principles in a certain system. Generally speaking, "primitive" is an important concept, which has profound meaning and application in various fields.