以下为句子列表：
英文: A painless pulse of electricity can drive drugs, which tend to be charged, through the impermeable outer layer of the epidermis and into the blood vessels of the dermis.
中文: 无痛的电流脉冲可以趋使药物（通常会带电荷）穿越不通透的表皮外层，进入真皮层的血管。
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英文: Abstract: In this article, starting from solute′s transport a nd diffusion equati on, aiming at the saturation state of liquid in homogeneous soil of impermeable stratum and on the condition that lots of saturated solute (e.g. nutriment) on t op of the so
中文: 文摘:从溶质输移扩散方程出发，针对强透水层上均质土壤的液体饱和状态，在顶层含有大量饱和溶质(如养分等)维持着渗透扩散的条件下，进行严密的数学推证，给出均质土壤中溶质浓度分布的解析解。
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英文: According to the constitutive relationship in linear piezoceramics, elliptical crack problems in impermeable case are analyzed with hypersingular integral equation method.
中文: 摘要在线性压电陶瓷本构关系和裂纹边界绝缘的框架下，用超奇异积分方程的方法对椭圆类片状裂纹问题进行了重新研究。
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英文: Although skin can be a relatively impermeable barrier, a few drugs have just the right physical and chemical characteristics to cross it at reasonable rates.
中文: 虽然皮肤是相当不易穿透的障碍，但少数药物的物理化学特性，恰好能让这些药物以合理的速率穿过皮肤。
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英文: Because the main drive mechanism is bottom water drive and the effects of lateral boundaries are negligible, it is assumed the gas reservoir is infinite with an impermeable upper boundary and a constant pressure lower boundary, without losing generality.
中文: 由于底水气藏的产气主要由底水驱动而得，侧边边界影响可忽略，故假定气藏由上边界封闭和下边界定压的无限大区域所导出的产能公式便具有普遍意义。
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