可以用“an innocent bystander caught in the crossfire”表示。“an innocent bystander”表示“无辜的旁观者”， “caught in the crossfire”意思是“被卷入争端”，所以整个短语字面意思即为“被卷入争端的无辜旁观者”，和网络流行语“躺着也中枪”不谋而合～
相关短语&句子
旁观者：onlooker/ bystander
Lookers-on see more than the players旁观者清,当局者迷
Lookers-on see most of the game.旁观者清,
Spectators see clearly while the participants are often lost in the maze 旁观者清,当局者迷
