今年长江中下游的水位高得不正常。
This year water levels in the middle and lower reaches of the Yangtze are unusually high.
水位上升，就会发生洪水。
高水位有利于钓鱼。
密西西比河的水位已经比正常水位低6.5英尺。
The water level of the Mississippi River is already 6.5 feet below normal.
环保主义者称引流河水将导致地下水位下降和水井干枯。
Environmentalists say that diverting water from the river will lower the water table and dry out wells.
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.
地面高度与水位没什么明显的区别。
There wasn't enough difference between the height of the ground level and the water level.
有了稳定的水位，他们的家就安全多了。
地下水位的上方是包气带，雨水从中渗透。
Above the water table is the vadose zone, through which rainwater percolates.
今年到目前为止，水位高到火烈鸟无法筑巢。
So far this year, water levels have been too high for the flamingos to nest.
地下水位是地层岩石裂缝和孔隙充满水的边界。
The water table is the underground boundary below which all the cracks and pores are filled with water.
地下水位是不平坦的，而是通常随地势而变化。
The water table is not flat but usually follows the contours of the topography.
水位高涨。
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.
当下降的水位低于内表面刻下的小时线，表示经过了多少时间。
The falling water level denoted the passing hour as it dipped below hour lines inscribed on the inner surface.
如果没有排水系统，地下水位就会上升，把溶解的盐带到地表。
If no drainage system exists, the water table rises, bringing dissolved salts to the surface.
现在水位已恢复正常，你应该不会有什么麻烦了，脚下的小路非常平坦。
The water level's back to normal now and you shouldn't have any trouble, the path's very level underfoot.
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.
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.
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.
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.
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.
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.
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.
在某些情况下，地下水位到达地球表面，在那里以河流、湖泊和沼泽的形式表现出来。
In some cases, the water table reaches Earth's surface, where it is expressed as rivers, lakes and marshes.
如果夏季水位下降，就像在北美大部分地区所发生的那样，那么海狸居所入口可能会暴露。
If water levels fall in summer, as they do in most of North America, then beavers lodge entrances may be exposed.
和其他那些与来自地狱或高水位的坏蛋战斗的所谓的英雄们不同，草履虫是个逃兵而非战士。
Unlike all of those other so-called heroes who battle the bad guys come hell or high water, Paramecium is a deserter not a fighter.
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.
研究人员指出，低频过程诸如河流流量和地下水水位的波动，通常不会对人类产生明显影响。
The researchers pointed out that low-frequency processes, such as fluctuations in stream flow and groundwater levels, would not usually be apparent to human populations.
在半岛北部，海拔足够低，因此古玛雅人能够经由被称为竖井的深层排水口或深洞探及地下水位。
In the northern peninsula the elevation is sufficiently low that the ancient Maya were able to reach the water table at deep sinkholes called cenotes, or at deep caves.
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