Teeth have a hard surface layer called enamel.
牙齿有一层叫做釉质的坚硬表层。
The Arctic mammals, known as "sea unicorns" thanks to their single long tusks, also transmitted measurements for the winter layer of surface water that shields sea ice from the warmer waters below.
这种因为长着一根长牙而被称为“海洋独角兽”的北冰洋哺乳动物，同时还传输冬季海水表面的温度，这层海水将海面冰层和下面温暖的海水隔离开来。
Surprisingly, precious metals instead appear relatively abundant on the planet's surface and in the underlying mantle layer. [Infographic: Tallest Mountain to Deepest Ocean Trench].
令人惊讶的是，在地球表面和下面的地幔层里贵金属反而比较丰富。
The acidic pH interacts with the hair's slightly negative charge to help the cuticle, the outer layer of the hair, maintain a smooth, flat surface.
酸性PH值和头发上的微量的负电荷相互作用，以此来帮助毛小皮，即头发表面的一层，保持表面光滑平整。
Conversion film: chemical or metal electrochemical treatment by the formation of the contains the metal surface membrane layer of the compounds.
转化膜：对金属进行化学或电化学处理所形成的含有该金属之化合物的表面膜层。
These larger ions take up more room and are pressed together when the glass cools, producing a layer of compressive stress on the surface of the glass.
这些钾离子占据更大的空间，当玻璃冷却下来的时候，钾离子便挤压在一起，从而在玻璃表面生产一层压应力层。
Since all forms of potassium alum are soluble in water, when the stone is wet or applied to wet skin, an invisible, fine layer of the mineral is rubbed off the stone and applied to the skins surface.
因为各种状态的钾明矾都能溶于水，当把它弄湿或接触湿皮肤时，会有一层肉眼看不见的细腻矿物层从钾明矾表面脱落，吸附到皮肤表面。
The connections between the spherical gaps in the sponge are then enlarged, using a technique called electropolishing to dissolve the surface layer of the metal.
通过采用一种叫电解抛光的技术来溶解金属的表层，使得海绵中球体间隙的连接被扩大了。
In some systems, foam at the surface may not cause a lot of damage, but the presence of a foam layer normally indicates extensive air entrainment.
在一些系统中，油液表面的泡沫不会造成很大的损害，但泡沫的存在说明相当量的空气滞留在油液当中。
All of this information gives scientists a picture of what the surface layer of dirt looks like now and whether or not it might have been a habitable area at some point in the planet's past.
所有的这些信息给科学家们展示了一幅土壤表层现在的图画，也说明了该星球在过去某一时间是否为一个适合居住的地方。
As the surface layer of the culture, material culture is embodied on the spatial surface of the urban culture.
物质文化作为文化的表层，体现在城市的文化空间层面上。
Geologists think that this fluidized ejecta crater indicates that a layer of permafrost, or water ice, lies just a few meters under the surface.
地质学家认为，这个具有流体化喷出物的陨石坑表明，在地表下几米深处有一层永久冻土层或水冰。
Ozone forms a protective layer between 12 and 30 miles above the Earth's surface.
臭氧在距地球表面12至30英里的地方形成一个保护层。
Like carbon dioxide, black carbon absorbs sunlight and infrared radiation, trapping heat in the atmosphere — including the boundary layer closest to Earth's surface.
像二氧化碳一样，黑碳吸收阳光和红外线辐射，将热量滞留在大气中-包括最接近地球表面的边界层。
As the ozone layer is depleted, more UV radiation reaches the Earth's surface.
当臭氧层消失时，更多的紫外线辐射到达地球表面。
The pink to white region above the clouds appears to be the stratosphere; this atmospheric layer generally has little or no clouds and extends up to approximately 50 km above the Earth’s surface.
云层上粉色到白色的部分是平流层所在的位置，这个层次中通常很少有云，大约延伸到离地球表面50千米的空中。
The pink to white region above the clouds appears to be the stratosphere; this atmospheric layer generally has little or no clouds and extends up to approximately 50 km above the Earth's surface.
云层上粉色到白色的部分是平流层所在的位置，这个层次中通常很少有云，大约延伸到离地球表面50千米的空中。
Nevertheless, astronomers still believed that when a comet approached the Sun—where they could study it—the Sun's intense heat would remove the corrupted surface layer, exposing the interior.
尽管如此，天文学家们仍然相信，当一颗彗星接近太阳时——这是他们可以研究它的地方——太阳的高温将会移除损坏的表层，露出内部。
PRK removes the thin surface layer of your cornea (epithelium). Your eye surgeon then USES a laser to flatten your cornea or make its curve steeper.
PRK是移除角膜薄的表层(上皮细胞)，然后眼科医生用激光使角膜平坦或弯曲。
They are transient tangles in the sun's magnetic field that are slightly cooler than their surroundings and so appear as dark patches in the photosphere—the surface layer of the sun.
它们是位于太阳磁场上暂时性的比周边温度偏低的混乱的一块区域，也因此看起来就像光球——太阳表层上的暗斑。
They are transient tangles in the sun’s magnetic field that are slightly cooler than their surroundings and so appear as dark patches in the photosphere—the surface layer of the sun.
它们是位于太阳磁场上暂时性的比周边温度偏低的混乱的一块区域，也因此看起来就像光球——太阳表层上的暗斑。
Hair furcation because the surface layer (or periostracum) of hair stem has been already damaged.
头发分叉是因为毛干的表层(或角质层)已经损坏。
At the initial stages of restoration, improvement on the soil biological properties by lichen and moss were represented mainly on surface layer soil.
在恢复初期，地衣和苔藓对土壤生物学性质的改善主要体现在土壤表层。
The filtration belongs to deep filtration or surface layer filtration.
这类过滤属深层过滤或表层过滤。
This paper introduces the characteristics of the technology of modified emulsified asphalt fiber coat and its use in the construction of road surface layer.
介绍了改性乳化沥青纤维封层技术特点及在路面上作为封层的施工应用。
The nutrients are deep down in the active layer anyway, not high up near the surface, which is the part of the active layer most affected by run-off.
不管怎样，营养物质存在于活性层深处而不是在表层附近，活性层受径流影响最大的地方。
Road pavement area: includes 2 pavement construction teams. Be responsible for production and other management work of selected layer, subbase layer and surface layer of this section.
路面工区：包括2个路面作业队。负责本标段的选定层、底基层和面层的生产等管理工作。
Using the hypothesis, we analyzed differences in surface layer under the same conditions.
应用这种假说，我们分析了在相同情况下地表层的差异。
A nearly confluent elastin surface layer was present throughout but was missing at atherosclerosis-susceptible branch points, exposing dense collagen-proteoglycan complexes.
弹性蛋白的表面层几乎是汇合的但在易发生动脉粥样硬化的分叉点却是缺失的，高密度的胶原-蛋白聚合物暴露。
A nearly confluent elastin surface layer was present throughout but was missing at atherosclerosis-susceptible branch points, exposing dense collagen-proteoglycan complexes.
弹性蛋白的表面层几乎是汇合的但在易发生动脉粥样硬化的分叉点却是缺失的，高密度的胶原-蛋白聚合物暴露。
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