ultralight down

ultralight down ultralight down ultralight down down I'm down,down,down. Baby are you down down down down aircraft 与 plane 有什么区别?主要是用在什么场合?经常看到的都是使用 aircraft 这个词儿,很少见到 plane.Ultralight AircraftSport Aircraft come down and down calm down clam down cut down Cut down come down take down deep down down to cut down ?