Shampoo foam stability is thus promoted by an electrostatic double-layer repulsion of opposite sides of the soap film between neighboring bubbles.
因此看来，洗发水泡沫的稳定性来自于相邻泡泡对立面的双层静电斥力。
Shampoo or beer, on the other hand, can have foam that persists for several minutes or even hours.
而对于洗发水或者啤酒，那些泡泡可以存在好几分钟甚至几小时。
Charge separation stabilizes shampoo foam.
维持洗发水泡沫稳定的是分离电荷。
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