These direct light downward to reduce light pollution and light at night.
这些向下的直射光减少了夜晚的光污染。
Lighting has been designed to avoid pollution of the night sky.
设计了光照设备，以避免夜晚天空的污染物。
Even at night, big cities like New York glow from light pollution, making stargazing2 difficult.
即使在夜晚，象纽约这样的大城市因光污染而灯火通明，使得观望星星困难。
These direct light downward to reduce light pollution at night.
这些向下的直射光减少了夜间的光污染。
The rays of street lights and the dust of pollution cover the night sky.
夜空被街灯的光线与飞扬的尘埃覆没。
The rays of street lights and the dust of pollution cover the night sky.
夜空被街灯的光线与飞扬的尘埃覆没。
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