tilt at windmills
對無法實現的目標或虛幻的敵人進行無謂的奮斗或戰斗
書面·表達無謂奮斗
英文釋義
to fight imaginary enemies or engage in a futile or pointless endeavor
例句
He's tilting at windmills by trying to reform the entire system alone.
典故來源
源自塞萬提斯小說《堂吉訶德》，主角將風車當作巨人攻擊，比喻徒勞對抗虛幻敵人。