1. a unit of illuminance on a surface that is everywhere 1 foot from a point source of 1 candle. 
   一支蜡烛的点光源在每英尺表面的照度的单位。
2. A large open section of a building, often with a glass roof or skylight. 
   天井建筑物的一片大的开阔区，通常有玻璃顶或阳光
3. A skylight constructed so that it cannot be opened. 
   固定天窗这样建造的天窗使它不能被打开
4. An enclosing framework, such as that around a skylight. 
   围栏一种围起来的结构，如天窗周围的围栏
5. In short, the skylight stimulates the red and green cones almost equally, while stimulating the blue cones more strongly. 
   总之，天空的光线刺激红色锥体和绿色锥体的强度几乎相等，而刺激蓝色锥体的强度最大。

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• 1. 天窗照度
  illuminance meter 照度计...illuminance of skylight 天窗照度...illuminant 施照器; 照明剂; 光源
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