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1·The region has a very high population density.

这一地区人口密度很高。《柯林斯英汉双解大词典》

2·Jupiter's moon Io, whose density is 3.5 grams per cubic centimetre, is all rock.

木星的卫星木卫一全是岩石，其密度为每立方厘米3.5克。《柯林斯英汉双解大词典》

3·Astronomers know that Pluto and Triton have nearly the same size, mass, and density.

天文学家们知道冥王星和海王卫一拥有几乎相同的体积、质量和密度。《柯林斯英汉双解大词典》

4·The density differential was replicated.

密度差被复制了。

5·Density is determined by how trees grow.

密度是由树木的生长方式决定的。

6·We call this variation the density differential.

我们称这种变数为密度微分。

7·One of the outer planets, Saturn, has a density of only 0.

土星是外行星之一，它的密度只有0。

8·The population density of that country is 685 per square mile.

那个国家的人口密度为每平方英里685人。《新英汉大辞典》

9·Variations in wood density affect vibrations, and therefore, sound.

木材密度的变化会影响振动，因此也会影响声音。

10·The average population density of the world is 47 persons per square mile.

世界平均人口密度为每平方英里47人。

密度

1·The region has a very high population density.

这一地区人口密度很高。《柯林斯英汉双解大词典》

2·Jupiter's moon Io, whose density is 3.5 grams per cubic centimetre, is all rock.

木星的卫星木卫一全是岩石，其密度为每立方厘米3.5克。《柯林斯英汉双解大词典》

3·Astronomers know that Pluto and Triton have nearly the same size, mass, and density.

天文学家们知道冥王星和海王卫一拥有几乎相同的体积、质量和密度。《柯林斯英汉双解大词典》

4·The density differential was replicated.

密度差被复制了。

5·We call this variation the density differential.

我们称这种变数为密度微分。

致密度

1·SEM and XRD results show that the composite that is hot rolled after vacuum forming, has relatively high density and can avoid being oxidized effectively.

结果表明，采用真空热压后热轧工艺制备的碳纳米管铜基复合材料的致密度较高且能有效地防止被氧化。

2·Result of the experiment show that, the shape , the composition and density have an important effect on the remelting process.

实验结果表明：坯料的外形、成分、致密度对复合材料的重熔工艺有着重要的影响；

3·By adopting appropriate foundry techniques, the accuracy of dimension and shape were ensured. The surface quality and internal density of runner meet the requirements of design.

通过采用合理的铸造工艺，确保了其叶片型线尺寸精度、转轮表面质量及铸件内部的致密度满足了设计要求。

4·Paraffin sections through observation, found that feeding the bees EM biological agents in the intestinal Peritrophic matrix (PM) thickness and density have increased.

通过石蜡切片观察，发现饲喂em生物制剂的蜜蜂中肠围食膜厚度和致密度有一定的增加。

5·When the conditions of the roll forming process well controlled, the film of batter plasticity, homogeneity, density and smoothness can be acquired.

通过调整影响轧膜成型的条件，可以制得具有良好可塑性、均匀度、致密度、光洁度的薄膜。

疏密

1·The author developed a new type of CAM motion curve - density cycloid motion curve.

本文开发了一种新型的凸轮运动规律——疏密化摆线运动规律。

2·The density and size of whorls are related to sedimentation rate.

螺旋的疏密、大小与相对沉积速度有关。

3·Stratosphere creates the viewer's imagination by the even shade of the color and the difference of the density of the prominence.

《平流层》由颜色的均匀渐变和突起的疏密不同来营造观者的想象空间。

4·Frame structure, loose, messy no density of points, will be very uninteresting.

画面结构松散，杂乱无疏密之分，则会令人感到索然无味。

5·Actual situation with the density, black and white, pen and ink and other factors influenced each other, generation.

虚实与疏密、黑白、笔墨等因素相互影响，相互生成。

(1)high density高密度，密度高

(1)current density电流密度；扩散（弥漫）流密度

(1)low density低密度

(1)power density功率密度；谱线密度；力密度

(1)energy density能量密度

(1)population density人口密度；种群密度