Actually, it is not pure clean water moreover some impurities such as bedload in the drainage system and bedload makes their characteristics different from pure water at the concentration, size, density, viscosity and so on.
实际排水管道中泥沙及固体杂质颗粒的浓度、粒径、密度、粘性等特性的存在使得管道内污水的流动特性与清水相比发生了改变。
参考来源 - 城市排水管道内污水两相流临界流速研究·2,447,543篇论文数据,部分数据来源于NoteExpress
We take having an endless supply of clean water for granted.
我们想当然地认为洁净水的供应无穷无尽而不予以珍惜。
Clean water is a precious commodity in that part of the world.
在世界的那个地方,洁净的水是宝贵的东西。
The clean water and green mountains are our treasures.
清洁的水和绿色的山是我们的财富。
The government could also use violations of other federal laws such as the Clean Water Act to collect money for the spill.
VOA: special.2010.06.04
But it does not keep people from getting health care or clean water to their houses."
VOA: special.2009.11.28
These include the Clean Water Act, the Pesticide Control Act, and the Endangered Species Act.
VOA: special.2010.04.21
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