名词
中文翻译：明显的相对密度
同义词：
['observable relative density', 'apparent relative density']
例句：
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1. The relativedensity of the sample is 0.85.
样品的相对密度是0.85。
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2. The relative density of the soil is affected by the amount of organic matter in it.
土壤的相对密度受其中有机质的含量影响。
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3. The relative density of the material can be used to determine its porosity.
材料的相对密度可以用来确定其孔隙率。