pile up

堆积, 积累

例句与用法：

Cars often pile up here in the rush hours.

在交通拥挤时刻汽车往往在这里挤成一团。

Instead of waiting until problems pile up, we should try to solve each as it arises.

问题一出现就应设法解决，不要等问题成了堆再去解决。

Oh, wow. There's a lot of work piled up.

哎呀，工作堆积得不少。

Strains in the earth's crest seem to pile up, mail the rock formations break with cracks into new positions, often causing large natural earthquakes.

地壳的应力似乎在积累着。直到岩层产生裂缝移位为止，这往往全引起大的自然地震。

详细释义：

1. 堆放起来

You may pile up the books here.

你可以把书堆放在这儿。

2. 积累

Our work is piling up.

我们的工作越积越多。

3. 互相碰撞挤成一团

Five cars piled up here yesterday.

昨天五辆车子在这儿相撞。