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....
The active ingredient in some of the mouthwashes was simply detergent.某些漱口剂中的有效成分只不过是洗涤剂而已。Speed is the essential ingredient of all athletics.速度是所有田径运动项目的关键要素。Coconut is a basic ingredient for many curries.椰子是多种咖喱菜的基本成分。...