relative density造句

1、The Vickers hardness exhibits a linear increase and the relative density increases too.
复合材料的硬度呈直线增加，相对密度也增大。

2、having high relative density or specific gravity.
具有很高的相对密度或者比重。

3、The relative molecular weight is 852 by using viscometry, its relative density is 1.
采用黏度法测定膦基聚马来酸的相对分子质量为852、相对密度为1。