density

• 表示物质紧密程度的名词，通常指单位体积的质量；也泛指事物分布的密集程度或集中程度，如人口密度、信息密度。

A noun referring to the degree of compactness of a substance, measured as mass per unit volume.

不可数

1. B2formalscientific

   The degree of compactness of a substance, measured as mass per unit volume.

   密度

   • The density of water is 1 gram per cubic centimeter.
   • Lead has a higher density than aluminum.
   • Scientists calculated the density of the new material.

2. Population densityB1formaltechnical

   The number of people living in a given area, usually per square kilometer or mile.

   人口密度

   • The population density of Tokyo is very high.
   • Rural areas have a lower density of inhabitants.
   • The government is studying the density of urban populations.

   同义词concentrationcrowding

   反义词sparsenesssparsity

3. Information densityC1formaltechnical

   The amount of information contained in a given space or medium.

   信息密度

   • This hard drive has a high storage density.
   • The density of data on the chip has increased significantly.
   • Modern screens have a higher pixel density for sharper images.

   同义词compactnessconcentrationfullnessintensityrichness