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

牙本质非常硬，但与牙釉质不同，它是多的。

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

这些是多的分子网络，空气可以通过它们循环。它们的多性使它们具有很大的表。

You see, my city is built on porous limestone rock, and the water will just come up through it.

你看，我的城市建在多的石灰岩上，水会从这里涌上来。

When the little, the porous things... ?

当小而多的东西......？

The reason for this is that, like many other porous materials, fresh snow is very good at absorbing sound.

原因是，像许多其他的多材料，新鲜的雪很容易吸声音。

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

漂浮在海上的石头波浪，因为玻璃是多可渗透的。

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

骨头的多材料被填充了小球体，基本上是蛋白石。

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

骨头可能看起来坚如磐石， 但实际上它们内部是多的。

You know, plenty of porous basalt rock in a geothermally active zone is one such example.

你知道，地热活跃带中大量多的玄武岩就是这样的例子。

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

为了吸，麻省理工学院的研究人员制造了一个多渗水的石墨薄片圆盘。

That water vapor wafts through a porous membrane made from plastic.

水蒸气飘过塑料制成的多膜。

Their porous leaves purify the air by trapping carbon and other pollutants, making them essential in the fight against climate change.

它们那多的叶子可通过捕获碳和其他污染物来净化空气，从而使其在应对气候变化时起到了至关重要的作用。

Rain sinks through the porous limestone down to groundwater levels, and consequently, no river runs through the land.

雨水通过多的石灰石下沉到地下水位，因此没有河流流经这片土地。

Carl fingered the blue-green leaves, porous like blotting-paper and shaped like birch leaves, hung on waxen red stems.

卡尔用手指抚摸着蓝绿色的叶子， 多的像吸墨纸， 形状像桦树叶， 挂在蜡红色的茎上。

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

例如，来自多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。

Porous pots like unglazed terra cotta might be better idea for wet climates.

像未上釉的陶土这样的多盆可能更适合潮湿的气候。

They all have a dense, smooth-looking external layer of compact, or cortical bone around a porous, honeycomb-looking area of spongy bone.

它们都有致密、滑的外层致密或皮质骨，围绕着多、蜂窝状的海绵骨区域。

They also use adsorption filtration, where a porous material called activated carbon strains the water to remove contaminants and chemical byproducts.

他们还使用吸附过滤，一种叫做活性炭的多材料过滤水以去除污染物和化学副产品。

He meant, perhaps, that the androgynous mind is resonant and porous; that it transmits emotion without impediment;that it is naturally creative, incandescent and undivided.

也许他的意思是， 雌雄同体的头脑是共鸣的和多的；它毫无障碍地传递情感； 它天生富有创造力、炽热而完整。

For porous surfaces like paper or walls, fingerprints are detected by spraying a solution called ninhydrin on the surface where a print may be found.

对于像纸或墙这样的多表，通过在可能发现指纹的表喷洒一种叫做茚三酮的溶液来检测指纹。