management by drive

例句：

1. 1. The car is driving at asteady speed.
   汽车以稳定的速度行驶。
2. 2. Hedrives his car to the airport every morning.
   他每天早上开车去机场。
3. 3. Thedriver must be careful whenchanging lanes.
   司机在变道时必须小心。