illuminance例句

Illuminance of illuminating radiation is always measured in photometric units.
照明辐射的照度通常是以光度为单位.

It refers to the specified average illuminance value on the lighted surface.
规定的被照明表面上的照度平均值.

Over a surface , Illuminance averaged over the specified surface.
指定表面上照度的平均值.