relative surface area

例句：

1. 1. The scientist calculated the relative surfacearea of the sample to determine its composition.
   科学家计算了样品的相对表面积以确定其组成。
2. 2. The engineer designed a newmodel with a larger relative surface area forbetter heat dissipation.
   工程师设计了一款具有更大相对表面积的新模型，以更好地散热。
3. 3. The researcher found that increasing therelative surface area of the materialcould improve its mechanical properties.
   研究人员发现，增加材料的相对表面积可以提高其机械性能。