racetrack microtron

例句：

1. 1. The driver was racing at the top speed on the racetrack.
   驾驶员在赛道上以最高速度行驶。
2. 2. The microtron is a small device that can be used to control the speed of a car.
   微电子装置是一种可以控制汽车速度的小型设备。
3. 3. The team was racing against each other for the championship title.
   团队之间为了冠军头衔而竞争。