This is water as perfect as it comes, pure enough for locals to drive a hole in the ground and drink. The source is the rain.
这水相当干净，以至于当地居民可以在地上挖个洞直接饮用，雨水是其来源。
The water shortage in this country is potentially catastrophic.
该国水资源的匮乏很可能是灾难性的。
A common theory for this unusual phenomenon is that the lemmings do not realize that the ocean is such a huge body of water.
对于这种不寻常的现象，一个普遍的理论是，旅鼠没有意识到海洋是如此巨大的一片水域。
Water circulated through heat reservoirs in this temperature range is able to extract enough heat to warm residential, commercial, and industrial spaces.
在这个温度范围内，通过蓄热器循环的水能够提取足够的热量来温暖住宅、商业和工业空间。
When this water is used for agricultural irrigation, farmers risk absorbing disease-causing bacteria, as do consumers who eat the produce raw and unwashed.
当这种水用于农业灌溉时，农民有接触到致病细菌的风险，那些食用了未加工和未经清洗的农产品的消费者也会面临这种风险。
If that one is called the land phase, then this has to be called the water phase, right?
如果那被称为陆相，那么这个就必须被称为水相，对吧？
If I rotate this faster than in two seconds when the bucket is upside-down if physics works, the water should not fall out.
如果我旋转的速度比桶倒过来的两秒钟还快，要是物理原理成立，水就不会掉出来。
Scientists agree that the key player in this scenario is the West Antarctic ice sheet, a Brazil-size mass of frozen water that is as much as 7000 feet thick.
科学家们一致认为，这一情境中的关键推手是南极西部的冰层，这是一块跟巴西（面积）差不多大小的冰原，厚达7000英尺。
The biggest concern of pumping out water from this deep is the gradual settling down of the land surface.
从这么深的地方抽水，最大的问题是地表会逐渐下沉。
When this is impractical you can at least make sure that you have a drink of water and let the water through your teeth to force out any particles of food.
当你做不到这样的时候，你可以确保你至少有口水喝，让水通过你的牙齿，排出所有食物残渣。
When this is impractical, you can at least make sure that you have a drink of water and let the water through your teeth to force out any particles of food.
当你做不到这样的时候，你可以确保你至少有口水喝，让水通过你的牙齿，排出所有食物残渣。
Marine construction technology like this is very complex, somewhat analogous to trying to build a bridge under water.
像这样的海洋建筑技术非常复杂，有些类似于尝试在水下建筑一座桥。
Ocean waters are constantly moving, and water temperature is both a cause and an effect of this movement.
海水在不断地运动，而水温既是这种运动的原因，也是它的结果。
This collagen is highly hydrated and it forms a gel that has water-like properties.
这种胶原蛋白是高度水合的，它形成了一种凝胶，有水一样的性质。
This gas is hydrogen sulfide, rises up and mixes with oxygen in the underground water that sits in the cracks and fissures in the limestone.
这种气体是硫化氢，上升后与石灰岩裂缝中地下水的氧气混合。
This germ—which is present in soil and water, not feces—is responsible for "swimmers ear", an itchy or painful inflammation of the ear.
这种细菌——存在于泥土和水中，而非粪便——是造成“游泳耳”的主要原因，症状是耳朵发痒疼痛和红肿。
This is because, according to Archimedes' principle of displacement, floating objects displace their own weight in water.
这是因为，根据阿基米德的位移原理，漂浮物在水中会转移自身的重量。
The rate at which the flowing water overcomes this resistance is related to the permeability of rocks.
水流克服这种阻力的速度与岩石的渗透性有关。
This is my report: One of the major problems in the Biramichi river is that the level of oxygen in the water is too low.
这是我的报告：比拉密契河的主要问题之一是水中的氧气含量太低。
Yet there is a dark side to this picture: despite our progress, half of the world's population still suffers, with water services inferior to those available to the ancient Greeks and Romans.
然而，这种情况也有其黑暗的一面：尽管我们取得了进步，世界上仍有一半的人口在受苦，供水服务还不如古希腊和古罗马人。
Some people have attributed this longevity to their consumption of a natural mineral water, which is remarkably free from impurities.
一些人认为这些人长寿应归功于他们饮用的一种明显不含杂质的天然矿泉水。
Beneath this active layer is a second layer called "permafrost", which is frozen all year around, and is impermeable to water.
在这一活跃层下面，是被称为“多年冻土”的第二层，终年冻结，不透水。
No matter where it comes from, this kind of water is sure to have something harmful in it.
不管这种水来自哪里，肯定含有有害物质。
This is a huge problem because dirty water can create illnesses.
这是一个大问题，因为脏水会导致疾病。
This is because fog is made of tiny water drops.
这是因为雾是由微小的水滴构成的。
Scientists are continually learning more about sleep, but one thing they know for sure is this—for humans, it is as important as food and water.
科学家正在不断加深对睡眠的研究，他们对其中的一件事实确信无疑：对于人类来说，睡眠与食物和水一样重要。
In order to find fish, the seals have to cross the deep water of the bay—this is where the sharks wait.
为了找到鱼，海豹必须穿过海湾的深水区——这就是鲨鱼等待的地方。
In order to find fish, the seals have to cross the deep water of the bay—this is where the sharks wait.
为了找到鱼，海豹必须穿过海湾的深水区——这就是鲨鱼等待的地方。
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