卡西米尔效应不是这种阻力的唯一起因，却是幕后主参。
The Casimir effect is not the only cause of stiction, but it is an important one.
卡西米尔效应在距离缩小到150纳米的时候急剧增强。
The effect was particularly strong at distances less than 150 nanometres.
但真正让研究人员兴奋不已的是卡西米尔效应有时可以被逆转为排斥作用。
What really excites researchers, though, is the idea that the Casimir effect may sometimes be repulsive.
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