"This sounds like it adds in a new factor," she added, referring to the research about the impact of city lights on atmospheric cleansing.

“这听起来似乎增加了一个新的(治理人造环境污染)因素，”她补充道，并提到这项以城市灯光对于净化城市夜生活效果为主题的研究。

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Previous research in this area has shown that, in general, above-ground drainage systems benefit from a reduction in pipe diameter to improve drain self-cleansing.

该领域过去的研究表明，一般说来，地面以上的排水系统能通过减小管道直径而受益，从而改进排水的自清理。

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