类地行星的密度的平均值大约是水的密度的五倍，而类木行星的密度平均值只有水的密度的1.5倍。
The densities of the terrestrial planets average about 5 times the density of water, whereas the Jovian planets have densities that average only 1.5 times the density of water.
当井和一个水池相接时，油通常会从井里上升，因为它与井下的水的密度不同，或者因为停留在它上方的膨胀气体的压力。
When the well reaches a pool, oil usually rises up the well because of its density difference with water beneath it or because of the pressure of expanding gas trapped above it.
海洋生物利用了水的密度的特性。
因为它没有液态水的密度大。
水的密度是空气密度的八百倍。
水的密度很接近。
冰浮于水，因为其密度小于水的密度。
Ice floats on water because the density is less than that of water.
因此，冰的密度小于水的密度，所以冰能浮在水上。
水星在太阳系中是密度第二大的行星，是水的密度的5.3倍。
It is the second densest planet in Solar System; 5.3 times that of water.
水的密度,是摩尔体积的倒数，所以密度，摩尔密度，等于一除以摩尔体积。
The density of water which is the inverse of the mole volume, so the density, the molar density, is equal to one over the molar volume.
一个物体是否会浮起，既取决于该物体的密度，又取决于水的密度。
Whether or not an object floats depends on the density of both the object and the water.
利用不同温度下纯水的密度值，给出了水的体胀系数的计量原理、公式和方法。
This article gave the measuring principle, formula and method of waters expansion coefficient by using density value of pure water in different temperature.
通过逐步改变初始和终止地下水位间土单元中孔隙水的密度模拟地下水位上升的效应。
The effect of the rise of ground water level was simulated by increasing the mass density of pore water in the soil elements between the initial and targeted ground water levels.
非饱和土的基质吸力与其中水—气体系的温度、孔隙水的密度和孔隙气的相对湿度有关。
Matric suction is relevant with temperature of water-air system, density of pore-water, and relative humidity of pore-air of unsaturated soil.
尽管这些河流带着大量悬浮的颗粒，这带有沉淀物的水的密度仍仅仅达到或者低于海水的密度。
Even though these rivers carry a significant sediment load in suspension, the density of the sediment-laden water is rarely at or above the density of seawater.
这种现象有着重要的生态学意义。如果冰比水的密度大，那么暴露于低温之下的湖泊将会从底部开始向上发生冰冻现象。
This phenomenon has important ecological implications in that if ice were to be denser than water, then the lakes, exposed to low temperatures would start freezing from the bottom up.
就像在第一点提到的，这要根据你的划水频率和在水里移动手臂的能力决定，牵涉到力量和耐力。 因为水的密度比空气大很多，不断地划水需要你手臂肌肉很好的耐力。
So in order to move your hand through water which is a much heavier medium than air, it will require more strength - to do that over time requires endurance of your arm muscles.
石油和天然气的密度都比水小，所以二者通常会浮在被水浸泡的岩石和沉积物的表层。
Both oil and gas are less dense than water, so they generally tend to rise upward through water-saturated rock and sediment.
而如果这两种介质的密度相差较大，就像空气和水那样，那么大部分的能量将会折射回来，只有一小部分会继续传播进入到新的介质中。
If the two media have really different densities, like air and water, then most of the energy is going to be reflected back, very little of it will keep going and get transmitted into the new medium.
研究人员们认为设计出了一种比乙醇的能量密度高出40%的生物燃料，而且它排斥水并能在制造速度上相对快捷。
The researchers think they have devised a biofuel that has a 40% higher energy density than ethanol, that repels water and that can be made relatively speedily.
将水引到小块农业用地的能力意味着霍霍坎人可以以相对高密度人口进行大规模的农业生活。
The ability to divert water into small agricultural plots meant that the Hohokam could live in large agricultural communities of relatively high population density.
出现内波是因为海洋是分层的，深层水更凉，密度高而且含盐量高，浅层水更暖和，密度小而且更淡。
Internal waves happen because the ocean is layered. Deep water is cold, dense, and salty, while shallower water is warmer, lighter, and fresher.
这使得来自地中海的密度较大的水像河流一样在海床上流淌，冲刷蚀刻出大概115英尺深0.6英里宽的水道和河岸。
This causes the dense water from the Mediterranean to flow like a river along the sea bed, carving a channel with Banks around 115 feet deep and 0.6 of a mile wide.
有些人曾假设，还有一些人则怀疑，由于水的重量和密度都更大，融水会切割近1公里的冰层，并向下渗漏。
The meltwater did indeed cut through nearly 1km of ice, as some had hypothesised and others had doubted, forcing its way down thanks to its greater weight and density.
比如，人口密度，街道状况，企事业数量，水的深度。
Such as population density, street layouts, number of enterprises, water depth.
供职于德国哥根廷马克思普朗克协会进行太阳系研究的霍尔格思科表示，这颗彗星的内部密度仅为水的一半。
The comet's interior, meanwhile, says Holger Sierks of the Max Planck Institute for Solar System Research, in Göttingen, Germany, has only half the density of water.
供职于德国哥根廷马克思普朗克协会进行太阳系研究的霍尔格思科表示，这颗彗星的内部密度仅为水的一半。
The comet's interior, meanwhile, says Holger Sierks of the Max Planck Institute for Solar System Research, in Göttingen, Germany, has only half the density of water.
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