短語詞組短語navigational technology 航?？萍?航海技術navigational system [航][水運]無線電導航系統(tǒng);[航][水運]導航系統(tǒng)Navigational instruments 導航儀器;航海儀器navigational planets 航用行星;[航]導航行星navigational intelligence 航行情報navigational tree 導航樹navigational rangefinder 航用測距儀navigational data 航行資料navigational plot 導航標圖navigational aid 導航輔助設備 返回 navigational