Early growth wood is relatively porous.

生长早期的木材是相对多孔的。

Late growth wood is denser, less porous.

晚生木材密度大，没有那么多孔。

Impacts on porous bodies generate less debris, so more energy goes into producing heat.

撞击多孔体产生的碎片较少，因此产生热量的能量更多。

A recent discovery that asteroids are highly porous makes Rubin's hypothesis more plausible.

最近的一项发现表明小行星非常多孔，这使得鲁宾的假设更加可信。

By contrast, dry soils are sandy and porous, their coarse textures permitting water to drain rapidly.

相比之下，干燥的土壤是沙质和多孔的，其粗糙的质地允许了水分的迅速流失。

The result is that sandstone, for example, can be as porous as the loose sand from which it was formed.

因此，举个例子，沙岩可以和构成它的疏松的沙粒一样具有多孔渗水的特点。

The pots were porous so that, although they could carry water in them, it wasn't possible to store it over a long period.

这些罐子有很多孔，因此，虽然它们可以携带水，但不能长期储存水。

Because they are porous, sedimentary rocks, such as sandstones and conglomerates, are important potential sources of groundwater.

由于像如砂岩和砾岩这样的沉积岩是多孔的，它们是地下水的重要潜在来源。

Fossils are often washed together on-site in a large bath which can allow water and contaminants in the form of contemporary DNA to permeate into the porous bones.

化石通常在大浴池中进行现场清洗，这可以使水和现代 DNA 形式的污染物渗透到多孔骨骼中。

The local limestone is so porous that all the rainwater immediately sinks below ground.

当地的石灰岩如此多孔以致所有的雨水很快渗到地下。

Most crystalline rocks are much more solid; a common exception is basalt, a form of solidified volcanic lava, which is sometimes full of tiny bubbles that make it very porous.

大部分结晶岩石都非常坚硬，但也有例外，最常见的就是玄武岩，它是一种火山岩浆凝固后的形态，内部充满了微小的气泡，因此也具有多孔渗水的特点。

In the laboratory, porous pot must be heated.

在实验室里，多孔锅必须加热。

As a result of fluvial scouring and aggrading the riverbed, the alluvial layer is fluid-saturated porous medium.

由于河流冲刷和河床加积，沉积层多饱和多孔。

At a given saturation nonwetting permeabilities for an unconsolidated porous medium are higher than the drainage permeabilities.

在给定的饱和度下，未固结的多孔介质的非润湿渗透率高于排水渗透率。

Porous ceramic materials on the base of strontium zirconate were developed with zirconium dioxide, baddeleyite powder, and granular polystyrol.

以锆酸锶为基体，采用二氧化锆、巴德雷石粉和粒状聚苯乙烯为原料，制备了多孔陶瓷材料。

He add sand to the soil to make it more porous.

他往土里搀沙子以提高渗水性能。

They designed an electrode made from porous carbon and lithium oxide.

他们设计出的电极由多孔碳和锂氧化物制成。

It is easy to sell the weapons once they reach Africa. Borders are porous.

一旦武器到达非洲大陆，就很容易卖出了。

One of the electrodes is composed of metallic lead, the other of porous lead dioxide.

金属铅充当一处电极，另一处电极是多孔二氧化铅。

Powder (for non-porous surfaces) : Metallic silver powder or velvet black powder.

粉末：银色粉末和黑色粉末。

Its low density has led scientists to speculate that it may consist of porous, icy material.

土卫十六密度较低，科学家因此推断它可能由多孔冰物质构成。

The material also has small spheres of porous silicon embedded in it. Their function is twofold.

该材料内嵌入小多孔硅球体，有双重作用。

Eastern Afghanistan also struggles with eradication, given insecurity and its porous borders.

考虑到其不安全因素及漏洞百出的边境线，阿富汗东部地区同样致力于消灭该病症。

A 2007 study by us researchers showed that the system was much more porous than previously thought.

一项2007年美国学者的研究表明，该系统比先前认为的更加多孔。

For the first time, too, us military personnel began crossing the porous frontier from Afghanistan.

首先是美国的军事人员第一次跨出阿富汗边境进入巴基斯坦。

But for some, the decline in density is rapid, as their bones become porous and fracture risk increases.

但是对一部分人来说，他们的骨密度会很快得降低，导致骨骼变得疏松，增加了骨折的风险性。

The new component is made of porous carbon, which is far less expensive than the lithium cobalt oxide it replaces.

新成分由多孔碳职称，比起它所替代的锂钴氧化物远为便宜。

It is not just about the extra heat, but also about stone's porous quality, which helps your pizza get a crisp bottom.

用石头来烤，不仅仅由于它可以提供额外的热度，还由于它透气的特性，这种特性可以让你的匹萨背面酥脆。