impermeable 是什么意思

	adj. 1.不能通过的。 2.不能透过的，不可渗透的。短语和例子 The passage became absolutely impermeable. 过道完全不通了。 impermeable to water 不透水的。 n. -bility

preventing especially liquids to pass or diffuse through; "impermeable stone"; "an impermeable layer of scum"; "a coat impermeable to rain"

	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 distance from the impermeable base to the free surface is a function of space and time . 由隔水底板至自由面的距离是空间和时间的函数。
	7.	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。
	8.	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。
	9.	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。
	10.	Test method for impact of impermeable graphite materials 不透性石墨材料冲击试验方法

impermeable是什么意思