| 1. | Thus clays and shales tend to be impermeable .
因此粘土和页岩就往往不透水。 |
| 2. | The passage became absolutely impermeable .
过道完全不通了。 |
| 3. | An impermeable cover is utilized to impound the stream .
用不透气的覆盖物把蒸气盖住。 |
| 4. | The external layer of the skin is relatively impermeable to water .
皮肤的外层不透水。 |
| 5. | On ground of raised beds, an impermeable cover is utilized to impound the steam .
在地面上高位栽培床用不透气的覆盖物把蒸气盖住。 |
| 6. | The accumulation of oil is governed by lateral changes from permeable to impermeable facies .
石油的储集是受从渗透到不渗透的岩相横向变化控制的。 |
| 7. | Oil is usually found in porous rock under a layer of impermeable rock which prevents it from escaping .
石油通常存在于多孔性的岩石中，上面覆盖着不可渗透的岩层，使石油不致散失。 |
| 8. | When rain falls, the loess particles on the surface layer swell and form a crust that is almost impermeable to water .
降雨时，表层的黄土粒就发生膨胀并形成一层几乎是不透水的表皮。 |
| 9. | Test method for impact of impermeable graphite materials
不透性石墨材料冲击试验方法 |
