Surfactants with ionizable heads are key to creating a repulsive force that counteracts the van der Waals attraction and thus stabilizes a soap film.

具有离子化头的表面活性剂是产生排斥力的关键，这种排斥力可以对抗范德瓦尔斯力，从而使的一个肥皂泡薄膜稳定的存在。

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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。

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It is found that the technology to be used to make soap film will influence the film quality and the latter can be improved by a reasonable heat treatment.

发现制膜工艺对质量影响很大，并分析了影响质量的原因。最后提出了合理的热处理有可能提高LM晶体膜质量。

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They argue that in South Korea, the pop music, film and soap opera industries are backed and nurtured by the ministry of culture.

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