Pulmonary cysts showed oval, water density shadow.

肺囊肿呈椭圆形水样密度阴影。

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Analyses the variation of ice storage volume around the three tubes under the effect of water density inversion.

研究了密度反转和等间距三管间相互作用下，围绕上、中、下三管外蓄冰过程蓄冰量的变化规律。

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Depending on wave height and speed, as well as wavelength and water density, each buoy can produce up to 40 kilowatts of electricity.

每一个浮标最高可以产生高达40千瓦的电力，发电的多少依赖于海浪的高度以及速度，同样也依赖于海浪的波长以及海水的密度。

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So, instead of having the periodic variation of water, or the periodic variation of air density here we're talking about an electric field.

不像水或者空气密度的,周期变化，我们这里,讨论的是电场。

麻省理工公开课 - 化学原理课程节选

Consider celery, often proposed as a negative-calorie food due to its low-calorie count, high water density, and impressive fibre content.

BBC: Who, Why, What: Can foods have negative calories?

The density of water molecules within the leaf is typically 60 times greater than the density of carbon dioxide in the air, and the diffusion rate of the water molecule is greater than that of the carbon-dioxide molecule.

WSJ: Harrison H. Schmitt and William Happer: In Defense of Carbon Dioxide

We have low population density, clean air, fresh water, fertile land, an ocean on either side and a grand total of two nations on our borders. (One of which is a also a huge, stable and peaceful nation with clean air, fresh water, and fertile land and even lower population density).

FORBES: Crossroads for the Sole Superpower