这个实例还不是很完善，因为时间、条件和个人能力的限制，系统还存在不完善的地方，希望能在今后的不断学习与应用中把它扩充得更加丰富-This example is not perfect, because of the time, conditions and individual capacity constraints, there are imperfections in the system, hoping in the future application of continuous le