densities

1. [U]密集,稠密 the quality of being dense
2. [C][U]密度 relation of mass to volume

high density高密度，密度高

current density电流密度；扩散（弥漫）流密度

low density低密度

power density功率密度；谱线密度；力密度

energy density能量密度

population density人口密度；种群密度

density function密度函数

probability density概率密度；几率密度

bulk density容积密度，体积密度；单位体积重量

relative density 相对密度（等于specific gravity）

density distribution密度分布

flux density通量密度；辐射流密度；流量密度

spectral density[电]谱线密度

probability density function机率密度函数；概率密度分布函数

charge density[化]电荷密度

power spectral density功率谱密度

high density polyethylene高密度聚乙烯

electron density电子密度；电子浓度

dry density[物]干密度；[物]干容重

linear density线密度

1. Mercury has a much greater density than water.
   水银的密度比水大得多。
2. The density of population in this city is very high.
   这个城市的人口密度非常高。
3. The driver had to stop because the density of the fog made it difficult to see.
   由於浓雾使道路很难看清,司机不得不停车。
4. The next trail would require a slightly higher filling density acid.
   在下一次试验时需要注入比重较高的酸。
5. The bicapillary pycnometer is a tool for accurate determination of density.
   双毛细管比重瓶是一种用于精确测量液体密度的仪器。