density是什么意思_音标_用法_例句

简单释义：

n. 密度；浓度；密集；稠密

网络 比重；黑度；强度

变形：

复数：densities  

完整释义：

n.

1.〔生〕生态密度
2.密集;稠密
3.密集性
4.稠密;浓厚
5.增密
6.〔化〕比重
7.通量
8.磁感应
9.愚钝,昏庸
10.【物理学】浓度;密度;比重

例句：

1. HDL, termed high-density lipoprotein, clears up cholesterol, takes it out of the system, is helpful .
   即高密度脂蛋白，清除胆固醇，把胆固醇从循环系统中去掉，是有用的。

2. But to produce the observed acceleration of the universe, the constant's density would have to be twice that of matter.
   但若想造成现今观测到的加速膨胀，则这个宇宙常数的能量密度须为物质密度的两倍。

3. It is often impossible to differentiate between structure and density contrast in determining the source of a gravity anomaly.
   在确定重力异常源时，不可能在构造与密度差之间作出抉择。

4. When trying to decide whether an object will float in water, you need to know whether its density is greater or less than that of water.
   若要判断一个物体是否会在水中沙浮起，就得知道该物体的密度比水大还是比水少。

5. They discovered that star formation is pretty well non-existent until the surface density reaches a certain threshold in parts of the cloud.
   他们发现恒星只有在表面密度达到一定的阀值时才会较好的形成。

6. Right the average wind speed is shown as well as the dynamic pressure, being half the density times the wind speed squared.
   权的平均风速显示以及动态压力的一半，密度倍风速平方毫米。

7. Generally, gemologists refer to specific gravity, or relative density — the ratio of the density of a gemstone relative to that of water.
   一般来说，宝石指比重，或相对密度-宝石的密度相对于水的密度。

8. The density, mass, and size compare favorably to that of Earth. But, the atmosphere and surface features differ markedly.
   它密度、质量和大小都和地球差不多，但大气和表面却截然不同。