一、轨迹的定义给轨迹下定义,教材是用两种观点进行的. 第一种是运动的观点,先用有规律运动的物体的轨道形象地说明.即“一个动点按照某条件所经过的路线,叫做满足某条件的点的轨迹”.这种定义方法浅显易懂,有较强的直观性教学原则.但缺点有二:其一是没有突出地揭示轨迹 First, the definition of the trajectory is defined under the trajectory. The teaching material is based on two viewpoints. The first is the viewpoint of the movement. First, the trajectory of the object with regular motion is illustrated. That is, “A moving point passes a certain condition. The path is called the trajectory of a point that satisfies a certain condition. This definition method is easy to understand and has a strong intuitive teaching principle. But there are two disadvantages: the first is that it does not reveal the trajectory prominently.