湿地对地下水，即地表以下的水量影响很大。
Wetlands have a big effect on groundwater, the amount of water below the surface of the land.
城市地下空间，是指城市规划区内地表以下的空间。
Urban underground space is the space under the city planning area.
该管的是洋溢着产品和密封地表以下的液体，以确保不存在空在包裹内。
The tube is filled with product and sealed below the surface of the liquid, ensuring there is no air space in the package.
因此勘探的挑战在于弄清一个地域地表以下的地质问题并为埋藏的矿藏明确定位。
The challenge in exploration is therefore to unravel the subsurface geology of an area and pinpoint the position of buried minerals.
佩伦和他的同事们还不能确定是什么引起了火星的倾斜，但他们认为这是地表以下的力量所致。
Perron and his colleagues aren't certain what caused the toppling of the planet, but they think forces beneath the surface are to blame.
城市地下空间的开发利用，广义上讲是利用城市地表以下的空间，发挥城市功能的一切地下设施。
The development and utilization of urban underground space in a broad sense mean all underground facilities for utilization of urban underground space and execution of city's function.
他们设计了一个能从地表以下1000英尺处抽水的系统。
They have designed a system which pumps up water from nearly 1,000 feet below ground.
把湿地想象成一块巨大的海绵：地球吸收大量的不断涌向地表的，增加了地表以下水量的这些水。
Think of wetlands as a giant sponge: the earth soaks up a lot of this water that's continually flooding the surface, which increases the amount of water below.
为了能尽可能清楚地表达我的观点，让我简要地说明以下在理论上非常有可能存在的矛盾。
In order to express my ideas as clearly as possible, let me sketch the following variant which is theoretically quite possible.
洞穴堪称最神秘的构造，是大自然母亲在地球表面，或者更精确些，在地表以下巧夺天工的创造。
Caves belong to the most enigmatic formations, created by Mother Nature on the surface of planet Earth, or, to be more accurate, beneath it.
地表的耐久力：耐久力是需要所有野外旅行者懂得的一个重要概念。以下的自然地表对野外行进有不同的反应。
Surface Durability: The concept of durability is an important one for all backcountry travelers to understand. The following natural surfaces respond differently to backcountry travel.
为了防止反复冰冻解冻循环的损害，地基的底部必须在霜线以下（此处的土壤不受地表冰冻的影响）。
To prevent damage from repeated freeze-thaw cycles, the bottom of the foundation must be below the frost line.
岩溶地下水赋存于地表以下浅部岩溶带、构造控制的中部岩溶带和深部古溶蚀带。
The karst groundwater stores in the shallow karst zones below the surface, the middle karst zones controlled by geological structures and the deep zones of fossil karst.
得挖到地表以下2千米的地方才能找到石油。
To reach the petrol sometimes you need to dig something like 2 km below the surface.
本仪器用于探测地表以下几十米至数百米范围内的介质构造。
This equipment can be used to investigate the structure of shallow layers, ten to several hundred meters below surface.
这种教学清楚地表明，我们的整个生命，在这里和以下，取决于原则从我们开始，我们的生活态度及其各种问题。
This teaching makes it clear that our whole life, both here and hereafter, depends upon the principle from which we begin, and on our attitude toward life and its various problems.
粘土通常在地表以下一米的位置。
究其原因，原来是大气中的温室气体造成了这种温度上的差异。温室气体吸收，并再度释放了远红外辐射，使得底层大气与地表保持温暖(参见以下附图)。
The discrepancy is due to greenhouse gases in the atmosphere, which absorb and re-emit infra-red radiation, and thus keep the lower atmosphere, and the surface, warm (see the diagram below).
以下哪种说法能最好地表达本文的中心思想？
Which of the following statements best expresses the main idea of the passage?
提出了上海地区自地表以下10～20米范围内天然强度的经验公式；
A empirical formula is given for the strength-depth relationship of soils at 10 to 20 meters dcpth.
以下的自然地表对野外行进有不同的反应。
The following natural surfaces respond differently to backcountry travel.
横波传播不受孔隙流体性质的影响，与纵波相比，横波的近地表层可以达到潜水面以下。
As the S-wave transmission from the impact of fluid properties, compared to the longitudinal wave the near-surface of S-wave can reach under the water table.
普罗迪的角度总是深入地表以下。
探地雷达作为一种高效、先进的无损检测设备，能够对地表以下实施续扫描，实时获得雷达图谱。
Ground penetrating radar as a highly efficient, advanced non-destructive testing equipment, is able to implement continued scan of the underground place and have real-time access to radar images.
探地雷达作为一种高效、先进的无损检测设备，能够对地表以下实施续扫描，实时获得雷达图谱。
Ground penetrating radar as a highly efficient, advanced non-destructive testing equipment, is able to implement continued scan of the underground place and have real-time access to radar images.
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