它们的种子的顶端向上生长，其距离地面的高度刚好可以接触到风；它们的体型大小也刚好是生长所需的尺寸；它们的茎是空心的，且仅仅是通过体内的含水量来保持自身的坚挺。
Their seed heads raised just high enough above the ground to catch the wind, the plants are no bigger than they need be, their stems are hollow, and all the rigidity comes from their water content.
可以从中抽取水的地下蓄水层被称为含水层。
A groundwater reservoir from which water can be extracted is called an aquifer.
冰川是地球水循环的一部分，其含水量仅次于海洋。
Glaciers are part of Earth's hydrologic cycle and are second only to the oceans in the total amount of water contained.
水的开采取决于含水层的两个性质：孔隙度和渗透性。
Extraction of water depends on two properties of the aquifer: porosity and permeability.
砂岩通常是良好的含水层，而细粒泥岩通常是不透水的。
Sandstones generally make good aquifers, while finer-grained mudstones are typically impermeable.
这些含水层在一万多年前就饱和了，现在不再重新补充水分了。
These aquifers became saturated more than 10,000 years ago and are no longer being recharged.
在印度、中国、美国等地，地下含水层被抽离的速度比自然补给还要快。
Groundwater aquifers are being pumped down faster than they are naturally replenished in parts of India, China, the USA and elsewhere.
这种情况在德州最为严重，那里气候最干燥，抽水量最大，含水层含水最少。
The situation is most critical in Texas, where the climate is driest, the greatest amount of water is being pumped, and the aquifer contains the least water.
水在含水层中并不是静止不动的，而是会从泉水中渗出，或渗入其他含水层。
Water does not remain immobile in an aquifer but can seep out at springs or leak into other aquifers.
总之，这些花粉化石，还有含水层和岩画，这三样东西都证明了撒哈拉沙漠曾经比现在绿得多。
Anyway, it's this fossilized pollen along with the aquifers and the rock paintings, these three things are all evidence that the Sahara was once much greener than it is today.
这个含水层被命名为奥加拉拉含水层，以曾经居住在这个地区的奥加拉拉-苏族印第安人的名字命名。
This aquifer was named the Ogallala aquifer after the Ogallala Sioux Indians, who once inhabited the region.
地下含水层位于地下1000到3000英尺之间，这意味着抽水成本很高，还有其他接踵而来的问题。
The aquifers range from 1,000 to 3,000 feet below the ground, which means that pumping will be expensive and there are other concerns.
"因此，人们认为充满水分的岩石样本的总含水量既包括可能会渐渐流失的水分，也包括不会流失的水分。
The total volume of water in the saturated sample must therefore be thought of as consisting of water that can, and water that cannot drain away.
尽管发达国家的人口、工业产出和经济生产率还在飙升，但人们从含水层、河流和湖泊取水的速度已经放缓。
Although population, industrial output and economic productivity have continued to soar in developed nations, the rate at which people withdraw water from aquifers, rivers and lakes has slowed.
尽管许多食品天然富含水杨酸盐，但在过去几十年里，食品加工公司也一直在食品中添加水杨酸盐作为防腐剂。
Although many foods are naturally rich in salicylates, for the past several decades, food-processing companies have also been adding salicylates to foods as preservatives.
撒哈拉沙漠下面是巨大的含水层，基本上是一片淡水的海洋，那可能是经过岩石层过滤的，已经有一百万年历史。
Beneath the Sahara are huge aquifers, basically a sea of fresh water, that's perhaps a million years old filtered through rock layers.
奥加拉拉含水层是一个砂岩地层，位于从德克萨斯州西北部延伸到南达科他州南部，约583000平方公里土地的地下。
The Ogallala aquifer is a sandstone formation that underlies some 583,000 square kilometers of land extending from northwestern Texas to southern South Dakota.
痰液的出现也显示了从含水泡沫状痰液到粘液痰液到粘膜粘液痰液的过程。
The appearance of sputum also showed the process from watery frothy sputum to mucus sputum to mucopuraleat sputum.
这篇论文讨论了含水率、温度和时间等因素对W/O乳状液流变性的影响。
This paper discusses the influence of water volume fraction, temperature, and time on the rheological properties of W/O emulsion.
行星含水的证据来自更加微妙的理由。
The evidence for planetary water comes from slightly more subtle reasoning.
多吃富含水份的食物。
农民们脚下的含水层损耗同样严重。
Just as serious is the depletion of the aquifers on which farmers depend.
富含水果和蔬菜的饮食对身体健康很重要。
Eating a diet rich in fruits and vegetables is important for good health.
黄瓜富含水分及维他命c，能帮助消除眼袋和眼睛红肿。
Mostly water and high in Vitamin c, cucumbers' properties help reduce puffiness and inflamed eyes.
尤其是玉米中含水量谷氨酸较高，能帮助促进脑细胞代谢。
Especially maize have the higher water content of glutamic acid, which can help promote brain cell metabolism.
钻进机据说能钻破岩层进入含水层，但看起来不行。
The machine that promises to break bedrock into the aquifer seemingly can't.
含水肌肤看上去比较饱满，所以皱纹也不那么明显。
Hydrated skin is dewy and plumper, so lines are less obvious.
很多水果蔬菜含水量高，占空间有分量却不含卡路里。
Many fruits and vegetables are high in water content, which provides volume and weight but not calories.
如果要提取水，每吨(表层土壤)含水量大约为一夸脱。
The average amount of water reported, if we were to extract it, is about a quart of water per ton (of surface soil).
空气含水量越高导致更多的降雪，反过来，这意味着更多的极地冰盖
More moisture in the air results in more snowfall which, in turn, means more polar ice... read more.
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