When an airplane performs in the air, the airplane can be regarded as a point, and the "airplane stay" is interpreted by mathematical knowledge as a point moving into a line. A line is made up of countless points, that is, the points move into a line.

The reason why the plane pulls the wire is because the high-temperature gas ejected from the engine nozzle vaporizes the water vapor in the surrounding gas, and then quickly condenses into small ice crystals floating in the air, forming white solid floating objects. Because the plane is supersonic, the flying speed of the plane is much faster than the falling speed of particles, so a white belt is formed, which will dissipate after a while.

Other examples of point-to-point alignment

1, inching into a line: when a car moves a distance, the distance it moves is a line.

2. the point moves into a line: the trajectory of the bullet through the air is a ballistic curve.

3, the point moves into a line: the candle is a point when it is lit, and it becomes a line when it moves.

4. Point to line: pencil line.