定向: directional; orient; orientation; sense of orientation; predetermined orientation 短语和例子无线电定向 radio range orientation; 给 ... 定向 give an orientation to; 定向爆破 directional [directed] blasting;
导航: navigation; pathfinding; pilot; guide 短语和例子无线电导航 radio navigation; 天文导航 celestial navigation; 雷达导航 radar navigation; 给出港船舶导航 pilot the ships out; 由 ... 导航 under the pilotage of ..
无线电导航: maritime radio navigationnavigation radioradio aid to navigationradio aidsradio air navigationradio guidanceradio navigation guidanceradio navigation=radionavigationrn radio navigation
