density是什麼意思_音標_用法_例句

簡單釋義：

n. 密度；濃度；密集；稠密

網路 比重；黑度；強度

變形：

複數：densities  

完整釋義：

n.

1.〔生〕生態密度
2.密集;稠密
3.密集性
4.稠密;濃厚
5.增密
6.〔化〕比重
7.通量
8.磁感應
9.愚鈍,昏庸
10.【物理學】濃度;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，清除膽固醇，把膽固醇從循環系統中去掉，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.
   但若想造成現今觀測到的加速膨脹，則這個宇宙常數的能量密度須為物質密度的兩倍。

3. It is often impossible to differentiate between structure and density contrast in determining the source of a gravity anomaly.
   在確定重力異常源時，不可能在構造與密度差之間作出抉擇。

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.
   若要判斷一個物體是否會在水中沙浮起，就得知道該物體的密度比水大還是比水少。

5. They discovered that star formation is pretty well non-existent until the surface density reaches a certain threshold in parts of the cloud.
   他們發現恆星只有在表面密度達到一定的閥值時才會較好的形成。

6. Right the average wind speed is shown as well as the dynamic pressure, being half the density times the wind speed squared.
   權的平均風速顯示以及動態壓力的一半，密度倍風速平方毫米。

7. Generally, gemologists refer to specific gravity, or relative density — the ratio of the density of a gemstone relative to that of water.
   一般來說，寶石指比重，或相對密度-寶石的密度相對於水的密度。

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