time

Time is an abstract concept, which shows the continuity and sequence of material movement and change. The concept of time includes two concepts: time and time period. Time is a parameter used by human beings to describe the process of material movement or the occurrence of events. The determination of time depends on the law of material circulation that is not affected by the outside world. For example, the cycle of the moon around the earth, the cycle of the earth around the sun, the cycle of the earth's rotation, and the cycle of atomic oscillation. Albert Einstein said that time and space are an illusion of people's cognition.