| 1. | As the surface freezes, the ice floats because it is less dense than water .
当湖面冻结时，冰由于密度小于水的密度而浮在水面。 |
| 2. | The specific gravity of a material is the ratio of its density to that of water and is therefore a pure number .
物质的比重指的是物质的密度与水的密度的比值，所以是纯数。 |
| 3. | Water has a density of 62 . 4 pounds per cubic foot
水的密度是每立方英尺62 。 4磅。 |
| 4. | Marine animals and plants take advantage of the density of water
海洋动物和植物利用了水的密度的特性。 |
| 5. | The density of water is 1
水的密度是1 。 |
| 6. | It is almost one and half times bigger than jupiter - - the largest planet in our solar system . and it is less dense than water
它几乎有木星? ?我们太阳系最大的行星? ?的1 . 5倍大。而且它比水的密度更小。 |
| 7. | Some parameters ( such as the density of water ) are well known ; others ( such as the likelihood of volcanic activity ) vary by a factor of 100 , 000
有些参数是大家早熟知的，例如水的密度，但其他参数却是以10万倍在变动著，例如火山活动的可能性。 |
| 8. | 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
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。 |
| 9. | 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
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。 |
| 10. | From the measured mass , the volume can be determined with a knowledge of water density and corrections for air buoyancy and thermal expansion of the vessel . the volumetric method requires a standard ( calibrated ) volumetric measure
重量分析测定法测定一个测试量器所载或所出的水的质量。从量得的质量，加上水的密度，空气浮力及容器的热力膨胀修正，便可测定容量。 |
