The apparent density of the powder is lower than its true density.
这种粉末的表观密度低于它的真密度。
Because the sample contains many pores, its apparent density changes with the measurement method and compaction level.
由于样品含有大量孔隙,它的表观密度会随测量方法与压实程度而变化。
词源 Etymology
apparent 源自拉丁语 apparēre(“显现、出现”),含义为“看得见的、表面上的”;density 源自拉丁语 dēnsus(“稠密的”)。合起来 apparent density 字面即“表面上测得的密度”,强调它是按外观/整体体积计算,而不一定等同于材料本体的真实致密程度。