density log密度测井densityn.密度；浓度；比重Density wave oscillation密度波型脉动density of magnetic flux[电] 磁通密度density functionnahheory密度泛函理论density of volume charge体电荷密度Density functionaltheory密度泛函理论density probability plot密度概率曲线图density of shallow layer地表浅层密度density of communication交际密度density measuring method密度测量方法density indicating meter密度指示计

1. A densitometer determines the density from the difference in lightness between absorbed and reflected light.
   光密度计由吸收光与反射光之间明亮度的差异决定密度。