pile-up effect

例句：

1. 1.The pile-up of cars on the road has caused congestion.
   道路上汽车的堆积导致了拥堵。
2. 2. The company's decision to increase production will have a pile-up effect on its profits.
   公司决定增加生产将对其利润产生堆积效应。
3. 3.The new law aims to prevent pile-ups in traffic by requiring drivers to use their turn signals.
   新法律旨在通过要求司机使用转向灯来防止交通中的堆积现象。