这是因为光源越广，射在物体上光线的方向就越多，这会起到增加场景中的照明、减少阴影的作用。
This is because, with a broad source, light rays hit your subject from more directions, which tends to fill in shadows and give more even illumination to the scene.
人工照明系统阻碍了空气污染物与水分子的结合，起到了净化空气的作用。
Artificial lights block formation of molecules that bond with air pollutants to clear the air.
采用先进技术提高路灯自动化控制与管理水平，已经在城市道路照明系统建设当中发挥着越来越重要的作用。
Improving the automated control and management level of street lamp with advanced technology has become more and more important during the construction of city Road lighting system.
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