"No photography allowed during the performance" 表示在演出期间不允许拍照。
这句话的来源可能是为了保护版权和隐私，以及避免在演出期间拍照会打扰其他观众。
下面是一些例句：
Please turn off your cameras and put away your phones. Photography is not allowed during the performance. 请关闭摄像头并收起手机。在演出期间不允许拍照。
No photography or recording is allowed during the show. 请勿在演出期间拍照或录音。
Please respect the performers and other audience members by not taking photos or videos during the performance. 请尊重表演者和其他观众，不要在演出期间拍照或录像。