短语词组短语back - scattering 反向散射Compton Back -scattering 康普顿背散射back raman scattering 后向喇曼散射Back -scattering Matrix 反向散射矩阵Raman back -scattering 拉曼背散射光子;拉曼散射光backscattering coefficient 反向散射系数 返回 back scattering