我们知道，石膏是溶于水的。
如果你知道世界上90%以上售卖的瓶装水都含有塑料微粒，你还会喝吗？
Would you still be drinking it if you knew that more than 90 percent of all bottled water sold around the world contains microplastics?
你知道，我仍然不是很清楚水文循环，也就是水在地球和大气之间的来回转移。
You know, I am still not too clear about the hydrologic cycle, the transfer of water back and forth between the earth and the atmosphere.
因此，地质学家们想知道，断层内部的加压水袋是否会使板块之间的摩擦力减小，从而使板块彼此远离。
Geologists therefore wondered whether the friction between the plates was being reduced by pockets of pressurized water within the fault that push the plates away from each other.
我们都知道，如果没有食物和水，离开沙漠似乎是不可能的。
As we know, it seems impossible to leave the desert without food and water.
你知道地球四分之三是被水覆盖的吗？
Do you know three quarters of the earth is covered with water?
老人知道男孩的目的后，递给他一个空碗，然后说：“到几英里外的河边去，把碗装满水。”
When the old man learnt about his purpose, he handed the boy an empty bowl and said, "Go to the river miles away and fill it with water."
那么你怎么知道每天是否补充了足够的水呢？
How do you know if you are not getting enough water each day?
后来我琢磨她是不是没放出浴盆里的水是因为她知道我会回来呢。
Later I wondered if she had left the water in tub because she knew I would come back..
我们都知道水对于日常生活的重要性。
他说：“如果我是宇航员，我会想知道：要多远会找到够饮用的水？”
If I'm an astronaut, I want to know: 'How far do I have to walk to find pockets of water?
要知道，金星上多的是水。
水对鱼说：我知道，因为我的心里装着你的寂寞。
他们不知道的是有些瓶装水并不像他们想象的那么纯净。
What they may not know is that some bottled water may not be as pure as they expect.
我们知道水都是往下运动的，就好比如同下雨一样，但是你会发现如果在右边的水也向下运动，就会产生一个空隙，在吸管里会有一段真空部分。
We know the water moves downwards when its left to itself as in rain, but you see if it moves downward on the right that would leave a gap, vacuum a hole in the pipe.
它们想回来和我们在一起，它们想回到自己的领地，在一个它们知道能获得食物、水和栖息之地的安全地方度过夜晚。
They want to come back with us, they want to go back into their enclosures, and spend the night in a safe, secure area where they know they get food and water and shelter.
我们知道水是生命组成的一个关键。
根据水的蒸发现象，人们知道液体在一定的条件下能变成气体。
From the evaporation of water, people know that liquids can turn into gases under certain conditions.
我觉得知道食物和水的来源而不把他们当成是理所当然的东西是很重要的。
I think it's important to learn where food and water come from and not take them for granted.
这意味着你应该知道，你的自来水是哪里来的，废水又要流到哪里去； 你用的电能是怎么产生的；
It means knowing where your water comes from and where it goes, where your electricity is generated and where your rubbish ends up.
你或许现在很健康，但想想几个月后或几年以后，我们都知道这座城市的水会致我们于死地！
You might be healthy now, but think about your health in a few months or in several years. We all know that the water in this city can kill us!
但含有除草剂的水不能再排向河流，而且我们知道低水位将会对习惯于高水位的河流生态系统造成危害。
But water containing the herbicide cannot be released back into the river and it is known that low water levels can harm river ecosystems accustomed to higher levels.
我们知道巨型水蝽只攻击移动的猎物，所以这只58毫米长的昆虫可能是先抓住并杀死这只幼小的金线龟后才开始食用它。
The giant water bugs are known to only attack moving prey so it is likely that the 58mm insect captured and killed the young turtle before feeding on it.
据以往的经验你知道水将变凉而且使你精神振作，在水里玩玩肯定很有意思，所以你决定去游泳。
Based on your past experience you know the water will be cool and refreshing, and playing in the waves will be fun, so you decide to go for a swim.
专家说，东电公司肯定已经知道水将会被红热的核燃料棒加热至沸腾并变成蒸汽，这就增加了它们暴露在空气中的可能。
TEPCO must have known, experts say, that the water was boiling and being turned into steam by the red-hot fuel rods, thus increasing the exposure of those rods to the air.
赫拉偏爱波塞冬，又嫉妒正义女神的母亲，她知道水是生命的源泉，一定会让人类感到和平。
Hera liked Poseidon and envied the mother of the Goddess. She knew water was the source of life and could make people peaceful again.
赫拉偏爱波塞冬，又嫉妒正义女神的母亲，她知道水是生命的源泉，一定会让人类感到和平。
Hera liked Poseidon and envied the mother of the Goddess. She knew water was the source of life and could make people peaceful again.
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