beholder
n. 旁观者

例句与用法:

  1. I don't understand how he can think she is good looking, but beauty is in the eye of the beholder.
    我不明白他怎么会认为她漂亮,不过情人眼里出西施罢了。
  2. She seems very plain but he dotes on her, but beauty is in the eye of the beholder.
    她看上去相貌平平,但他非常爱她,情人眼中出西施。

英英解释:

名词 beholder:

  1. a person who becomes aware (of things or events) through the senses
  2. 同义词:perceiver, percipient, observer