surfactant

例句：

1. 1. The oil-water mixture needs a surfactant to help it separate easily.
   油水混合物需要一种表面活性剂来帮助它容易分离。
2. 2.Surfactants are used in many industrial processes to improve the efficiency of mixing and separation.
   表面活性剂在许多工业过程中被使用，以提高混合和分离的效率。
3. 3. The surfactant helps to reduce the surface tension between the oil and water, making it easier to separate.
   这种表面活性剂有助于降低油和水之间的表面张力，使分离变得更容易。