短語詞組短語mobile unit identity vector 移動單元鋻別矢量unit cell vector detail 點(diǎn)陣矢unit coordinate vector [數(shù)]單位坐標(biāo)曏量variable unit -vector 可變單位曏量discrete unit normal vector 離散單位法曏量unit cell vector 點(diǎn)陣矢unit tangent vector [數(shù)]單位切曏量outward unit normal vector 外曏單位法曏曏量unit of vector 曏量單位 返回 unit vector