onlooker

名词 onlooker:

1. someone who looks on
   同义词：looker-on

1. He fell into the water, much to the entertainment of the onlookers.
   他跌进水中，旁观者大乐。
2. By the time the ambulance had arrived, a crowd of onlookers had gathered.
   救护车赶到时，围观的人已经很多了。

on.look.er

n.（名词）
One that looks on; a spectator.
旁观者：一旁观望者，一位观众