average illumination

• 平均照度

average illumination的用法和样例：

例句

1. The average illuminance over the reference surface at the end of the complete maintenance cycle.
   灯具在维护周期末期在参考表面上的平均照度。
2. It is the ratio of the specified minimun illuminance to average illuminance on the lighted surface.
   规定的被照明表面上的最小照度平均照度之比。