平均反射率 meaning in English

average reflectance
mean reflectance
mean reflectivity
rm

( 3 ) with the condition of table 4 . 3 , with increasing of temperature the average reflectance value decreases and the minimum reflectance point moves towards red direction . furthermore , temperature has little effect on the extinction coefficient ( k ) . however , the refractive index value decreases remarkably when the temperature reaches about 240 , but it does not change much when the temperature is below 180 and the thickness of the films increase when increasing the temperature
( 3 )随着温度的增加薄膜的平均反射率降低并且反射低谷向长波方向移动;温度对消光系数k影响不大;当温度低于180薄膜的折射率变化不大,当温度达到240左右时薄膜的折射率明显降低;薄膜的厚度随温度的增加而增加;随着温度的增加tio2的晶体结构由混晶变为单一的锐钛矿相,薄膜的表面的颗粒由多变少,表面形貌由粗糙多孔变得细腻平滑。