beacon – n. a radio signal that is broadcast to help guide ships, airplanes, etc.

forecast – n. to say that (something) will happen in the future

geostationary – adj. moving in orbit in space along the equator, so that it remains stationary to a fixed point on the surface

sophisticated – adj. highly developed and complex

transponder – n. a device that receives a radio signal and sends out a signal in response and that is used especially to show the location of something
 2/5   首页 上一页 1 2 3 4 5 下一页 尾页