a telecommunications link for signals coming to the earth from a satellite, spacecraft, or aircraft (信号从卫星或航天器的)向地传输,下行线路
verb
[with obj.]relay to the earth (a telecommunications signal or the information it conveys) 转播(信号或信息) any TV station can downlink just about any game. 所有电视台都可以转播几乎所有的比赛。