Surfactant can become the single numerator monolayer on the surface of water,and it can be used to repress water evaporation,which is one of its important applications.

• 不溶性表面活性剂,可以在水面上形成单分子膜,单分子膜的一个重要应用就是阻止水的蒸发,因此可以作为抑制水蒸发的阻止剂。