translation.en: And there's really only one operational aircraft in the world today that's a vertical-takeoff aircraft -- as distinct from a helicopter -- and that's the Hawker Harrier jump jet.
translation.zh: 现在世界上投入运行的 可以垂直升降的飞机——不算直升飞机—— 只有一种，就是“鹞”式飞机。