表面活性剂、助剂、软水剂、增白剂。

Surface active agent, auxiliary, water softener and whitener.

另外，在准备面膜时，尽量使用软水。

Also try to use soft water when preparing facial masks.

软水草原产于亚洲，并在20世纪60年代引入美国。

Hydrilla was found in Asia and was introduced to the United States in the 1960s.