Vehicle Mean Speed

• 平均速度

Vehicle Mean Speed的用法和样例：

例句

1. The average speed of the trains in China is increasing.
   中国火车的平均速度一直在提高。
2. Use a graphing program such as Excel to graph the second distance on the x-axis and average speed on the y-axis.
   计算气球上每个点相对银河系的平均速度。