不幸的是，这一个违反电中性的原理，在这个理论中不同带电的电解质如同水电解液那样是电中性的。

Unfortunately, the finding violates the principle of electric neutrality, in which the differently charged molecules of an electrolyte like water cancel out.

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顶棚的清洁方法通常是先用大功率吸尘器和刷子进行大面积的清洁，然后用中性的洗涤液着重清洁污垢集中的地方，最后再全面的清洁一次。

Cleaning method of roof is usually first with high-power vacuum cleaner and brush to clean the area, then use neutral detergent on cleaning dirt place, then a comprehensive clean.

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清洁方法通常是先用大功率吸尘管和刷子进行大面积的清洁，然后用中性的洗涤液着重清洁污垢，最后再进行全面清洁。

Cleaning method is usually use first high-power aspiration and brush to clean the area, then use neutral detergent emphatically dirt, thorough cleaning again finally.

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