The slightest motion of a patient in bed creates friction between skin and sheets and results in loss of cells from the skin's outermost layer.
卧床病人最轻微的活动就会在皮肤和床单之间产生摩擦力，结果就会引起皮肤最外层脱落。
The effect of microbubbles in the boundary layer on the skin friction of the plate is presented in this paper based on the computational results.
本文根据计算结果，研究了边界层中的微气泡对平板表面摩擦阻力的影响。
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