It's very kind of crumbly and porous.

它非常易碎且多孔。

You know, the mud houses are so porous.

你知道吗，泥屋太透气了。

But those walls are increasingly porous.

然而，这些态度已经越来越薄弱了。

Now, the divisions between these five categories are porous.

现在，这五个类别之间的分界是模糊的。

Part of the problem, the country's porous borders.

问题的一部分在于这个国家的边界。

Even their psychological self felt a bit porous at times.

他/她心理上的自我也时常感到千疮百孔。

Have you noticed how porous or spongy good bread is?

你有没有注意过, 面包烤得好, 就能呈现非常明显的海绵状结?

Bones might seem rock-solid, but they're actually quite porous inside.

骨头看上去和石块一样坚固，但它们中心其实相当多孔。

To absorb sunlight, M.I.T. researchers created a porous disc of graphite flakes.

为了吸收阳光，麻省理工学院的员制造了一个多孔渗水的石墨薄片圆盘。

They say a porous border is another reason people are coming in.

他们表示，边境漏洞百出是移民抵达的另一个原因。

Waves of stone, floating on sea foam all because the glass is porous.

漂浮在海面上的石头波浪，因为玻璃是多孔可渗透的。

Dentin is pretty hard, but unlike enamel, it's porous.

牙本质非常硬，但与牙釉质不同，它是多孔的。

Here's a look at how porous the border is between Kenya and Somalia.

接下来我们为你带来肯尼亚和索马里两国的边界是多么驻守不严。

There, they mess with the fatty molecules a bit, ultimately making the barrier more porous.

在那里，它们稍微搅乱了脂肪分子，最终使屏障更容易渗透。

That porous material that was the bone got filled in with little spheres, opal, basically.

骨头的多孔材料被填充了小球体，基本上是蛋白石。

They're saying that not rotating crops is not a good thing because the soil is less porous.

他们认为，没有轮作农作物并不是件好事，因为土壤的透水性会减弱。

These are porous molecular networks through which air can circulate. Their porosity gives them a huge surface area.

这些是多孔的分子网络，空气可以通过它们循环。它们的多孔性使它们具有很大的表面积。

These vessels must not be porous, or they will let the liquids escape which we put into them.

但是这些器皿可不能“渗透”，不然盛上液体就会漏出去。

Groundwater sourced near porous rocks, for example, will contain more minerals, while water from glaciers has almost none.

例如，来自多孔岩石附近的地下水将含有更多的矿物质，而冰川融水几乎没有矿物质。

Winding passageways are narrow and dark. And the walls are made of unforgiving limestone, porous and with sharp edges.

蜿蜒曲折的通道狭窄又黑暗。石灰岩筑成的墙壁很难对付，气孔众多，而且边缘锋利。