translation.en: Fortunately, necessity remains the mother of invention, and a lot of the design work that we're the most proud of with the aircraft came out of solving the unique problems of operating it on the ground -- everything from a continuously-variable transmission and liquid-based cooling system that allows us to use an aircraft engine in stop-and-go traffic, to a custom-designed gearbox that powers either the propeller when you're flying or the wheels on the ground,
translation.zh: 所幸 需求是发明之母 许多应用在 飞机上的高明设计 正好能够解决 陆地行驶的特定问题－ 数不胜数的例子 比如无段自动变速器 液态冷却系统 能让飞机引擎在时走时停的路上 应付自如 还有专用定制变速箱 对飞行所用的螺旋桨和驾驶所用的车轮能双管齐下