Compared with the East, however, the West faced a greater number of external threats along more permeable frontiers.
然而，与东方相比，西方在更容易渗透的边界上面临着更多的外部威胁。
Bamboo has become a popular choice in durable, air permeable, soft fabrics, and is used to make bedding, underwear, blankets, bags, hats, and much, much more.
竹子已经普遍用于制作耐用、透气、柔软的织物，并被用于制造床上用品、内衣、毯子、包、帽子等等。
我是透性膜。
Here's your semi-permeable membrane.
这是你的半透膜。
The flow of fluids such as water through more permeable zones in a reservoir.
流体（例如水）经储层中的渗透率较高地带的流动。
Rainwater will pass through permeable pavements into the ground , not out to sea .
雨水，会通过可渗透的路面到达土地，而不是海洋中。
Fracture is the important Spaces and migration channels of low permeable reservoir.
裂缝是低渗透油气藏的重要储集空间与运移通道。
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。
It is differentially permeable, hence it can control the entrance and exit of molecules and ions.
它是差异透性的，故可控制分子和离子的进出。
It forms a permeable aqueous film on the skin surface, to protect your skin from exterior irritation.
在皮肤表面形成一层透气性水膜，保护肌肤免受外界刺激。
Surfactant flooding is more suitable for low permeable reservoirs and uniform medium permeable reservoirs.
活性剂驱更适合于低渗透油藏和比较均匀的中渗透油藏。
Sandstones, which are porous and permeable, can provide the reaction space for fluid flow and rock interaction.
砂岩因其发育孔隙为流体的流动和流体与岩石的相互作用提供了场所。
The research shows that permeable formwork can obviously improve the surface quality and durability of concrete.
试验研究和应用结果表明，透水模板能显著改善混凝土的表面质量，有效提高混凝土的耐久性。
It introduces process control point of chrome corundum permeable brick and its application in smelting ferroalloys.
介绍了铬刚玉透气砖的生产控制要点和在铁合金精炼中的应用方法。
When all borders are crossable and all boundaries permeable, it is harder to imagine an idyllic realm or a permanent enemy.
当所有的边境都敞开大门，人们就更难想象出一个田园般的王国，或者永久的敌人。
But the stone walls between art and science aren't nearly as thick as they seem; indeed, in some ways they're entirely permeable.
但是，横亘在艺术和科学之间的石壁却没有看上去那么厚重；确实，在某些方面它们之间可以完全相互渗透。
The dividing lines between historic periods and geographic places are permeable: the Middle Ages flows into the Renaissance;
历史时期和地理位置的分界线相互交织：从中世纪过渡到文艺复兴时期；
Unfortunately, serious health problems can develop when foreign proteins are allowed into the infant's permeable intestinal tract.
遗憾的是，当外源(非母体)蛋白质进入婴儿的渗透性肠道时，可能会带来严重的健康问题。
However, permeable asphalt is best used in low traffic areas because it has a lower load-bearing capacity than conventional asphalt.
但是，透水沥青最好用在较低交通量的区域，因为比起传统的沥青路面，它具有的承载力较低。
A new generation of gas-permeable lens, they allow oxygen into your eyes during wear, preventing your eyes from becoming dry and sore.
新一代的透气型隐形眼镜在佩戴时有很好的透氧性，可避免眼睛干燥和疼痛。
Like the blood-brain barrier, this is only selectively permeable, keeping any toxins in the blood from reaching the delicate photoreceptors.
和血脑屏障相同，它是选择性可透的，阻挡血液中的有害物质进入到精致的感光层。
Mixed-conducting oxygen permeable membrane is a kind of ceramic membrane, which exhibits both electronic and oxygen ionic conductivity.
混合导体透氧膜是一类同时具有电子和氧离子两类导电性的陶瓷膜。
And there must be a permeable reservoir rock, such As sandstone or porous limestone, to provide pAssage and storage for the oil and gAs.
所以在附近就必须具有透水的储存岩石，如砂岩和具孔隙的石灰岩，为石油和天然气提供通道和贮存场所。
Devising a suitable membrane-tough enough to withstand the pressure while remaining permeable to water but not to salt-is harder than it sounds.
设计一种适合的膜非常困难：一方面要足够坚韧，以承受压力；但同时还要有渗透性，而且只能透水，不能透盐。
Pressurized water is passed over a semi-permeable membrane which allows the passage of water molecules while rejecting the passage of larger ions.
受压水经过半渗透膜，使得水分子能通过，而更大的离子却不会通过。
Pressurized water is passed over a semi-permeable membrane which allows the passage of water molecules while rejecting the passage of larger ions.
受压水经过半渗透膜，使得水分子能通过，而更大的离子却不会通过。
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