The injured boy was flown by air ambulance to the Royal London Hospital.受伤男孩由空中救护车送往伦敦皇家医院。An air ambulance helicopter came to the rescue.一架救护直升机飞来救援。He had to be flown by air ambulance to a Las Vegas hospital.他被迫由救护飞机送往拉斯维加斯的一家医院。They arrange the transfer of patients to other hospitals by air ambulance.他们安排救护飞机将病人转移到其他医院。