苗条的天鹅和纤细的臭鼬在滑滑的黏泥上游泳.Slim swans and slender skunks swim in the slippery slime.而循环冷却水系统生物黏泥的产生主要是因系统发生漏油事故所致.And the main reason to bring biological sludge into circulating water system is oil - leaking accident....