looker-on noun 复数形式 lookers-on someone who watches something that is happening in a public place but is not involved in it 在公共场所观看正在发生的事情，但没有参与其中的人；旁观者 At every gathering for dances, sports, or games of any kind there are more lookers-on than participants. 每次舞蹈、体育或其他比赛的活动中，旁观者都比参与者多。