After new regulations were brought in last year, planning permission must now be sought for the conversion to an impermeable surface of any area around your house bigger than five square metres.
自去年发布新规定之后，房屋四周改建任何五平米以上的非透水地面都要申请设计许可。
Particularly, the solution for impermeable silt-layer can be used to describe the tidal fluctuation in a confined aquifer under a tidal river separated by an impermeable layer.
特别地，当边界淤泥层为隔水层时，本文的解也可用来描述有潮河流下的承压含水层中的水头波动情况。
Thus clays and shales tend to be impermeable .
因此粘土和页岩就往往不透水。
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.
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。
Thus clays and shales tend to be impermeable.
因此粘土和页岩就往往不透水。
Impermeable formations, such as shales and siltstones, tend to be finer grained or of a mixed grain size, with smaller, fewer, or less interconnected pores.
不渗透的地层如页岩与粉砂岩。因颗粒很细或粗细颗粒混杂。只有较小，较少连通不好的孔隙。
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.
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。
Roma threaten but, although they seem to be impermeable just like their coach, they don't have the same potential as Milan.
罗马队在教练的指导下防守也不错，尽管有一定威胁，但他们的潜力不如米兰。
Roma threaten but, although they seem to be impermeable just like their coach, they don't have the same potential as Milan.
罗马队在教练的指导下防守也不错，尽管有一定威胁，但他们的潜力不如米兰。
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