From a philosophical point of view, people observe, think and express something from a "thinking angle", which is called "dimension" for short. For example, people's observation and thinking about the "moon" can be described from three thinking angles of the moon: content, time and space; It can also be described from the perspective of the moon's "carrier, energy and information".
Understand:
The common understanding is: "A point is 0-dimensional, a straight line is 1 dimensional, a plane is 2-dimensional, and an object is 3-dimensional". In fact, the concept mentioned in this statement is "premise" rather than "described object", and all described objects are "points". Therefore, its complete expression should be "the point based on point is 0 dimension, the point based on line is 1 dimension, the point based on plane is 2 dimension, and the point based on volume is 3 dimension".
Further explanation, the point on the description (positioning) point is the point itself, and no parameters are needed; Describing (locating) a point on a straight line requires 1 parameters (coordinate values); Describing (locating) a point on a plane requires two parameters (coordinate values); Describing (locating) a point on a volume requires three parameters (coordinate values).