牙齿有一层叫做釉质的坚硬表层。
在某些情况下，松散的土壤全部被风吹走，只剩下石质化的表层。
In some cases, the loose soil is blown completely away, leaving a stony surface.
因此，虽然冬季海冰覆盖面积可能减少，但表层水将足够冰冷，因此海冰覆盖面积不会减少太多。
Thus, although the winter sea-ice cover might decrease, the surface waters would remain cold enough so that the decrease would not be excessive.
如果前者较大，这个湖就是一个以表层水为主的湖泊；如果是后者，则是一个以渗漏为主的湖泊。
If the former are greater, the lake is a surface-water-dominated lake; if the latter, it is a seepage-dominated lake.
“ElNino（厄尔尼诺）”在西班牙语中是“孩子”的意思，当南太平洋表层海水异常变暖时，会出现厄尔尼诺现象。
El Nino, Spanish for "the child", occurs when surface ocean waters in the southern Pacific become abnormally warm.
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。
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.
降水往往会把细小的粘土颗粒转移到土壤的最微小的空隙中，使这些空隙变得封闭，从而形成了一种几乎不允许任何水分渗透下来的表层土壤。
The impact of raindrops on the loose soil tends to transfer fine clay particles into the tiniest soil spaces, sealing them and producing a surface that allows very little water penetration.
石油和天然气的密度都比水小，所以二者通常会浮在被水浸泡的岩石和沉积物的表层。
Both oil and gas are less dense than water, so they generally tend to rise upward through water-saturated rock and sediment.
经过特殊设计，这些电池板可以直接安装在现有道路表层，它们相对便宜并且易于安装。
The panels are also designed so that they can be installed directly on top of existing roadways, making them relatively cheap and easy to install.
然而，耕地被认为是对表层土壤造成严重损害的罪魁祸首，因为它清除了那些保护土壤不被吹走或冲走的植物。
However, plowing is blamed for causing severe damage to top soil by removing the plants that protect soil from being blown or washed away.
呈现日历web服务和样式表层。
暴风雨没有温暖的表层海水，根本难以持续。
The storms simply couldn't continue on without warm surface water to sustain them.
馅饼表层超薄的光面几乎有着黑漆皮的光泽。
The ultra-thin sheen on the surface of the tart had an almost patent-leather brilliance.
他们的研究围绕着对表层细胞膜复杂糖类的分析。
Their work revolved around an analysis of complex carbohydrates found on the surface membranes of cells.
下大雨的时候，山崩会把表层泥土席卷到海里。
When it rains hard, landslides sweep topsoil down to the sea.
冬季的风暴搅动大海，将表层海水与深层海水相混合。
Winter storms, it turns out, churn the ocean, mixing surface waters with deeper waters.
如果要提取水，每吨(表层土壤)含水量大约为一夸脱。
The average amount of water reported, if we were to extract it, is about a quart of water per ton (of surface soil).
无常的降水和表层土壤的流失都使土地逐渐减产。
Irregular rainfall and loss of topsoil means that the land produces less than before.
使用过多去角质的产品会除掉皮肤的表层，也就是保护层。
Too much exfoliating removes the top layer of the skin, which is the protective layer.
泥石流和洪水很有可能会发生，河流将冲走表层泥土。
Mud slides and floods are likely, with streams and rivers carrying off the topsoil.
村民会被劝说建造更多的梯田好让表层土不被冲刷掉。
Villagers may be persuaded to build terraces to stop topsoil running off.
而AIDSVAX包含一种艾滋病病毒表层的基因工程蛋白。
AIDSVAX contains a genetically engineered version of a protein on the surface of HIV.
这些表层堆积物覆盖面积达10平方公里（4平方英里）；
those deposits cover more than10 square kilometers (4 square miles).
它们非常有用，比如说，能让我们更好地了解物质的表层属性。
They are very useful, for example, in understanding the properties of material surfaces.
他们现在正着手优化该技术，以使其能应用于各种表层的油画。
They're now working on refining the technique, so that it can be used with paintings on various surfaces.
在河口湾出现的混合越强烈，次表层向陆地方向的流量就越大。
The more mixing that occurs in the estuary, the greater is the landward flow in the subsurface layer.
当决策表变得复杂时，一个新的决策表层级就会被创建。
When the decision table becomes too complex, a hierarchy of new decision tables can be constructed.
香烟中的尼古丁会使你皮肤表层的血管变窄，阻碍血液流向皮肤。
The nicotine in cigarettes causes narrowing of the blood vessels in the outermost layers of your skin.
香烟中的尼古丁会使你皮肤表层的血管变窄，阻碍血液流向皮肤。
The nicotine in cigarettes causes narrowing of the blood vessels in the outermost layers of your skin.
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