pressure density

例句：

1. 1.The pressure density of the gas is directly related to its temperature.
   气体的压力密度与其温度直接相关。
2. 2.The density of the liquid is affected by the concentration of the solute.
   液体的密度受溶质浓度的影响。
3. 3.The density of the soil is an important factor in determining the yield of crops.
   土壤的密度是决定作物产量的重要因素。