They can dive far below the surface.
他们可以潜到水面以下深处。
Typically, though, the water table may be tens or hundreds of meters below the surface.
不过一般来讲，地下水位可能会位于地表以下数十或数百米。
Wetlands have a big effect on groundwater, the amount of water below the surface of the land.
湿地对地下水，即地表以下的水量影响很大。
In the laboratory, when the seal dives below the surface of the water and stops breathing, its heart beats more slowly, requiring less oxygen, and its arteries become constricted.
在实验室里，当海豹潜入到水面以下并停止呼吸时，它的心脏跳动得更慢，需要的氧气更少，动脉也会收缩。
It is easier to test for low oxygen levels than to find the oil plumes far below the surface.
相比于监测深海的油柱，监测低氧区就简单多了。
We drive 10 kilometres in a comfortable minibus to the pit face, 355 metres below the surface.
乘着舒适的小型巴士行驶了十公里后，我们来到了距地面355米的煤矿采掘面。
This summer, such systems helped seal a BP well a mile below the surface of the Gulf of Mexico.
今年夏天，这样的系统帮助封堵了墨西哥湾水下1.6公里处英国石油公司的油井。
This enables you to see below the surface and view the internals of the system as it is running.
它让你能够看到表面一下的东西并看到系统运行时其内部的情况。
Scratch below the surface denial and class is everywhere, as I found in making these programmes.
揭开表象，阶级无处不在，正如我在节目制作过程中发现的那样。
"The salmon are less concerned about a white object as seen from below the surface," Reimchen speculates.
“大马哈鱼从水面以下往上看时，很少能注意到白色的物体，”莱莫什推测。
The central crater could be formed by unusual layers below the surface, or from a lucky second impact.
陨坑中心可能是由于不同寻常的下层地质结构导致的，也有可能因为幸运的二次撞击而形成的。
Next month we will dig a little deeper and look at the magic of IIOP that is happening just below the surface.
下个月，我们将稍微深入地发掘一下，看一看发生在表面现象之下的IIOP的神奇力量。
Rainfall helps keep it clean: water seeps through the rubber and drains into pipes just below the surface.
下雨则可以让它保持干净：水流渗过橡胶颗粒并注入表层之下的排水管道中。
Anything at or just below the surface of the seabed-the benthic zone, in fishery parlance-gets dragged up.
海底或仅仅在海底表面下一点，用渔业的说法，就是深海底栖带，任何生活在这里的生物都会被拖上来。
The one in Punjab has fallen from a couple of metres below the surface to, in parts, hundreds of metres down.
旁遮普邦的一处地下水下降了好几米，从地上算，已经是百米以下。
This section at 6 meters below the surface houses the ventilation equipment for the cooling of the transmitters.
地下6米处的这个区域，容纳了信号传送器通风冷却设备。
Its tentacles can extend 165 feet (50 meters) below the surface, although 30 feet (10 meters) is more the average.
它的触须能伸展到水下165尺（50米），尽管一般来说它们只能伸展30尺（10米）。
Communities of microorganisms have been found hunkered down in groundwater as far as 5 km below the surface of the land.
地表之下5公里的地下水中也发现了微生物群落。
Technicians can date paint from its chemical composition, for example, or X-ray a canvas to reveal what lies below the surface.
例如，技术人员可以通过其化学成分分析其创作日期，或者对一幅画做X光透视，揭示其表面下有什么。
Nestled forty feet below the surface of the clear blue Fijian Lagoon, the underwater suites will be accessible by elevator.
酒店安躺在透彻的斐济礁湖水下40英尺深的地方，搭乘电梯就可以轻易地到达水下套房。
The NOAA is monitoring these zones; it is easier to test for low oxygen levels than to find the oil plumes far below the surface.
NOAA 正在监测这些区域，比起寻找表面下油雾，测试低氧水平相对容易。
I was also amazed when our science teacher showed us what happens to a styrofoam head when it travels miles below the surface.
同样令我大吃一惊的是我的科学老师展示给我们的：当一个泡沫塑料沉到海平面一公里后的现象。
At the time, those questions of identity still lingered below the surface, even though I always knew I would restart my career.
那段时间，我的那些“认同感”的问题一直压抑在平静生活的表面之下。
Small moonquakes, originating several kilometers below the surface, are thought to be caused by the gravitational pull of Earth.
发源自月球表面以下几英里的轻微月震据估计是由地球引力的牵引造成的。
Visitors can dress up in jumpsuits and hard hats and descend in a creaking elevator to the coalface 300 metres below the surface.
参观人员穿上工作服和安全帽，乘坐吱嘎直响的升降梯下降到地面300米以下的产煤面。
Underwater cameras give a live feed from the source, a mile below the surface: oil gushing up from the seabed in a sinuous, ceaseless heave.
水下照相机从位于一英里深的海底，实时提供着信息资料：原油正从一个蜿蜒不断的隆起处涌出。
However, he generally provides enough details and examples in the body of the book to support main points and dive below the surface of an issue.
然而，他通常在书中提供大量细节和示例来支持主要观点并深入探讨某问题。
It might be one of the most unconventional hospital wards on Earth, except that technically it's not on Earth: it's hundreds of meters below the surface.
这里也许是地球上最不规范的住院部，只可惜，严格地说它不在地球上，因为它在地面以下数百米处。
It might be one of the most unconventional hospital wards on Earth, except that technically it's not on Earth: it's hundreds of meters below the surface.
这里也许是地球上最不规范的住院部，只可惜，严格地说它不在地球上，因为它在地面以下数百米处。
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