sky wave

英 美
  • n.天空电波(天波)
  • sky n.天空;天气;天国v.把...投向空中;将…高挂
  • wave n.波浪;波纹;波v.挥动;飘动
Noun:
  1. a radio wave that is reflected back to earth by the ionosphere or a communications satellite; permits transmission around the curve of the earth's surface