如果像北美大部分地区一样夏季水位下降，那么海狸的小屋入口就会暴露出来。
If water levels fall in summer, as they do in most of North America, then beavers' lodge entrances may be exposed.
包气带中的水会沉降到地下水位，只在矿物颗粒表面留下一层薄薄的水膜。
Water in the vadose zone drains down to the water table, leaving behind a thin coating of water on mineral grains.
当水到达合适的水位时，幼鸟就会被一条腐蚀性的沟渠保护，免受捕食者的伤害。
When the water hits the right level, the baby birds are kept safe from predators by a corrosive ditch.
提前发出的洪水水位上涨警报防止了又一次的重大灾害。
Early warnings of rising water levels prevented another major catastrophe.
在一些地方，水位正以每年一米的速度下降，需要定期加深井并使用更强大的水泵。
In places, the water table is declining at a rate of a meter a year, necessitating the periodic deepening of wells and the use of ever-more-powerful pumps.
事实上，水坝主要是应对水位年变化的一种策略。
In fact, dams are primarily a strategy for dealing with annual variations in water levels.
在科巴市，玛雅人围绕着一个湖泊修建堤坝，以提高水位，使供水更加稳定可靠。
At the city of Coba the Maya built dikes around a lake in order to raise its level and make their water supply more reliable.
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。
Typically, though, the water table may be tens or hundreds of meters below the surface.
在调查过去的气候条件时使用的一种非常古老的方法是测量古代湖泊的水位。
One very old method used in the investigation of past climatic conditions involves the measurement of water levels in ancient lakes.
美国西南部半干旱地区的湖泊水位在上一个冰河时代似乎比现在更高，这一事实曾一度归因于降水增加。
The fact that lake levels in the semiarid southwestern United States appear to have been higher during the last ice age than they are now was at one time attributed to increased precipitation.
当他们把一块石头扔进一个粗试管时，相连的一个细试管里的水位上升了。
When they dropped a stone into a wide tube, the water level raised in a connected narrow tube.
例如，在丘陵地区的一个池塘，尽管没有小溪流入但在整个干燥的夏季保持稳定的水位，显然一定是以渗流为主。
For example, a pond in hilly country that maintains a steady water level all through a dry summer in spite of having no streams flowing into it must obviously be seepage dominated.
水位达到一定高度时，水将推动一个控制杆，从而显示时间。
When the water reaches a certain level, it moves a lever and this shows the hours.
现在，我们有证据显示，在这些位置的珊瑚能躲过破坏性漂白这一劫，但在水位更浅和水温更高处生长的珊瑚则会受到影响。
Now, we have evidence that corals in these locations are able to escape the destructive bleaching that affects portions of the reef in shallower or warmer water.
由于地下水位不是平面的，而是随着地形起伏的，所以地下水和地表水一样受到重力的影响。
Because the surface of the water table is not flat but instead rises and falls with topography, groundwater is affected by gravity in the same fashion as surface water.
如果地下水位与地表相交，地下水将在泉水处流出地表，聚集于此或是随后沿着排水系统进一步流动。
If the water table intersect the land surface, groundwater will flow out onto the surface at springs, whether to be collected there or to subsequently flow farther along a drainage.
地下水位一直在下降，温度却年年上升。
科学家担心由于长江水位的改变，会使得未感染区域滋生一些钉螺栖息地。
Scientists fear changes in water levels along the Yangzi could create new snail habitats in areas previously untouched by the disease.
我国官兵对长江一条水位暴涨的支流垮堤进行爆破泄洪。
Chinese soldiers used explosives to blast part of a leaking dike so as to release flood waters on a swollen branch of the Yangtze River.
闸门关闭，水位上升，下一个闸门开启，再次关闭，水位再次上升，往复这个过程。
Gates close, water rises, gates open; then close, up, open again.
在越南长达一个多世纪的地下水过度开采使地下水位下降，与此同时，砷也随之深入。
More than a century of groundwater over-exploitation in Vietnam has drawn the water table down and, with it, arsenic.
他们将水位排到一定程度就在湖的边缘地带找到了数以百计的黄金制品。
They lowered its level enough to find hundreds of pieces of gold along the lake's edge.
一般情况下，一年的这个时候，水库的水位都会处在正常或高于正常水位线。
In general, reservoirs are at normal or above-normal levels for this time of year.
一个小孩在地下水位旁忙着制作起泡沫的浓肥皂水并用勺子搅拌着，在她旁边还有一个小孩。
A child was at the water table and she was busy sudsing up some soap and stirring with her spoon, and there was a child next to her.
在过去的几千年里水位下降并不是苏加塔湖唯一的变化。
Falling water levels are not the only changes at Lake Suguta over the past several millennia.
你可以想象一下，在10分钟内，水位将达到两层楼的位置。
You can imagine water levels as high as two-story buildings within 10 minutes.
一棵树一天要消耗好几夸脱的水，所以你得隔几个小时就检查一次架子里的水位。
Trees may use several quarts a day, so check the water level in the stand every few hours.
一棵树一天要消耗好几夸脱的水，所以你得隔几个小时就检查一次架子里的水位。
Trees may use several quarts a day, so check the water level in the stand every few hours.
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