Extended Twin (Engine) Operations扩展的双(发动机)操作 Engines Turn Or Passengers Swim引擎转或乘客游泳 Engines Turn(ing) Or Passengers Swim(ming)引擎转(ing)或乘客游泳(姚明) Extended Twin-Engine Over-water Operations除了水上作业。延长 Extended Twin-Engine Over Water Operations除了延长了水操作 Extended-Range Twin-Engine Operational Performance StandardsExtended-Range双引擎经营绩效标准