The water is usually naturally occurring groundwater that seeps down along fractures in the rock; less typically, the water is artificially introduced by being pumped down from the surface.
水通常是自然形成的地下水，沿着岩石的裂缝渗出；不那么典型的是，水是通过从地表抽水而人工引入的。
Air surrounds Earth and becomes thinner farther from the surface.
空气包围着地球。离地表越远，空气越稀薄。
Do you think that it is possible to eradicate mosquitoes from the surface of the earth?
你认为彻底消灭地球表面的蚊子是可能的吗？
But they didn't have to scoop a chunk of neutron degenerate matter from the surface of a real neutron star either.
但他们也并不需要从一颗真正的中子星表面挖来一块中子星简并物质。
A painting of a total lunar eclipse viewed from the surface of the moon, as imagined by Lucien Rudax in the 1920s.
一幅从月球表面观看月全食的绘画，法国天文科普大师吕都(Lucien Rudaux)在20世纪20年代的想像画作。
Giant particles are mainly particles detached from the surface.
巨粒子多半是从表面分离出来的粒子。
The Viking and Mars Pathfinder images from the surface look eerily Earth - like.
维京人号和火星探路者号传回的火星地表影像，与地球出奇类似。
Then he sent out a dove to see if the water had receded from the surface of the ground.
他又放出一只鸽子去，要看看水从地上退了没有。
Water evaporates from the surface of oceans, lakes, ponds, rivers, streams, and puddles.
水从海洋、湖泊、水塘、江河和水坑的表面蒸发。
Red sun just from the surface of the sea, to the beautiful and quiet sea with a layer of rose.
火红的旭日刚刚透出海平面，给美丽恬静的大海抹上一层玫瑰色。
The process will remove organic films and particulate debris from the surface of the stainless steel.
该过程能去除不锈钢表面的有机物膜和微粒子残骸。
We will go into three different kinds of orbits and the last of these will be about 200km in height from the surface.
探测器将要从三种不同的轨道对灶神星进行探测，其中第三个轨道距灶神星表面约200公里。
Each of the modules that project from the surface contains Windows that can open to provide natural ventilation.
每个表面突出的模块都包含可以打开提供自然通风的窗口。
It is now just 70 metres from the surface and islanders are already trying to come up with a name for the new island.
现在它距离海平面只有区区70米，岛上居民已经试着给将要出现的小岛起名字了。
For the narrative poems, the thematic significance derives from the surface meaning and the deep level connotation.
叙事诗的主题意义不仅体现在文字表层意思，还隐含在深层结构之中。
"We use a laser, and it's tuned to a specific frequency to remove the pigment from the surface of the iris," Homer says.
霍姆医生说，“我们用激光技术，把它调到特定的频率，去除虹膜表面的色素。”
Jellyfish are free-swimming members of the phylum Cnidaria . They are found in every ocean, from the surface to the deep sea.
水母是刺丝胞动物门的一员，它们的足迹遍布每一个海洋，无论是在海面还是深海区，我们都能看到它们的身影。
The subtle movement of abstract creatures and mysterious waters brings us in a space far away from the surface of this world.
影片中那些微妙蠕动的抽象生物和神秘的水景将我们带到一个远离现实的空间。
Root hairs feed from the surface particles, therefore the internal surface area has a great influence on plant food in the soil.
根毛从土粒表面吸收养分，所以，土壤的内表面积对土壤中的植物养分有很大影响。
It is preferable to use ground water that has passed through the natural filter of the soil than to collect water from the surface.
与收集地表水相比，使用通过土壤天然过滤的地下水更好。
Washing your face removes many bugs from the surface of our skin, particularly if you use cleansers containing alcohol as this kills bacteria.
洗脸会去除皮肤表面的许多细菌，若你使用含酒精的洁面产品就更加如此，因为酒精会杀死细菌。
The transmission of an extracellular signal from the surface of the cell to the nucleus by a relay of protein-protein and protein-ligand interactions.
细胞外的信号通过蛋白与蛋白和蛋白与配体的作用由细胞表面传送到细胞核。
Furthermore, continuous evaporative cooling from the surface water of the marina develops a micro-climate that benefits the entire outdoor setting.
此外，码头地表水不断蒸发冷却，创造了利于整个室外环境的微气候。
As they take off they pull up a thousand more birds from the surface of the lake with them, as if they were all but part of a reclining giant now rising.
他们呼啸着飞上天空，随之带动湖面上另外一千只野鸭一起腾飞，仿佛它们是躺着的巨人的一部分，现在起来了。
We use a laser, and it's tuned to a specific frequency to remove the pigment from the surface of the iris Homer says. The procedure takes about 20 seconds.
霍姆医生说，“我们用激光技术，把它调到特定的频率，去除虹膜表面的色素。这一过程会花20秒的时间。”
We use a laser, and it's tuned to a specific frequency to remove the pigment from the surface of the iris Homer says. The procedure takes about 20 seconds.
霍姆医生说，“我们用激光技术，把它调到特定的频率，去除虹膜表面的色素。这一过程会花20秒的时间。”
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