parallel bumps

例句：

1. 1. The car was hit by a parallel bump while driving on the highway.
   汽车在高速公路上行驶时被一个平行障碍物撞了。
2. 2.The construction workers were forced to make parallel bumps in order to complete the project on time.
   建筑工人被迫在规定时间内制作平行障碍物以便按时完成工程。
3. 3.The new road design includes parallel bumps to improve safety and reduce congestion.
   新的道路设计包括平行障碍物，以提高安全性并减少拥堵。