放慢速度

例句：

1. 1.The car slowed down as it approachedthe traffic lights.
   汽车接近交通灯时开始减速。
2. 2. The driver slowed down toavoid hitting a pedestrian.
   司机为了避开一个行人而减速。
3. 3. The train was slowingdown as it approached the station.
   火车在靠近车站时开始减速。