短語詞組短語the background lagrange intensity 背景拉氏密度background light intensity 背景光強度background reflection intensity 背反射強度Rated background field intensity 背景場強background radiation intensity 背景輻射強度;本底輻射強度Mean Background Intensity 平均背景密度intensity background radiation 背景輻射強度Low intensity background 低亮度背景Unpickable low intensity background 無法拾取的低亮度背景 返回 background intensity