pile-ups

例句:

• When life gets hard and you want to give up, remember that life is full of ups and downs, and without the downs, the ups would mean nothing.
  当生活很艰难，你想要放弃的时候，请记住，生活充满了起起落落，如果没有低谷，那站在高处也失去了意义。
  
• I have been involved in a number of start-ups.
  来自BBC
• Follow-ups were planned, largely recorded and then abandoned.
  来自BBC
• Eww what's that pile of part chewed camel?
  来自BBC
• The thick fog has caused several bad pile - ups on the motorway.
  因大雾弥漫,高速公路上发生了几起严重的连环撞车事故.
  
• The thick fog has caused several bad pile ups on the motorway.
  因大雾弥漫,高速公路上发生了几起严重的连环撞车事故.