Guangzhou is expected to take the lead in collecting light pollution fees in the country.
广州市将率先在全国开征光污染排污费。
In order to improve the sensor ability of collecting light, the authors add a self focus len on the to…
为了提高仪器探头的集光本领，在探头的端面处又粘一自聚焦透镜，从而可提高仪器的灵敏度以及测量精度。
A camera at the bottom of the lens tracks the viewers by collecting light coming the other way through the lens and the Angle of the LEDs changes to correspond to the viewers' movements.
透镜底部的摄像头通过收集反射回来的光线定位观众的位置，同时发光二极管的角度根据观众的移动发生改变。
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