immaculate congestion
基本解释
高速公路严重堵车后，在没有明显原因的情况下突然恢复畅通
英文释义
When traffic is backed up for miles on a highway, crawling along -- and then suddenly everyone returns to normal high speeds without passing an accident, stalled car, or road construction.
> We spent 45 minutes [bumper-to-bumper] for no reason?!? It must be immaculate congestion.
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