名詞 pile-up:

1. multiple collisions of vehicles
   同義詞：pileup

動(dòng)詞 pile-up:

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

1. The thick fog has caused several bad pile-ups on the motorway.
   因大霧彌漫，高速公路上發(fā)生了幾起嚴(yán)重的連環(huán)撞車事故。