as can be seen from the chart, the number of toya students who drove to school showed a trend of substantial increase and the index of difficulty for parking increased accordingly.
如图所示,托雅学生开车前来上课的人数呈现大幅攀升态势,而停车困难指数也同步大幅提升。
result the conception of final target size was put forward, an equation for calculating the movement time of target acquisition was obtained, and a new definition of index of difficulty was given.