pile up

名词 pile up:

1. multiple collisions of vehicles
   同义词：pileup

动词 pile up:

1. collect or gather
   同义词：accumulate, cumulate, conglomerate, gather, amass
2. arrange into piles or stacks
   同义词：heap up, stack up
3. get or gather together
   同义词：roll up, collect, accumulate, amass, compile, hoard

1. 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。
2. 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。
3. Oh, wow. There's a lot of work piled up.
   哎呀，工作堆积得不少。
4. 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。