slowing-down density

例句：

1. 1. The slowing-down density ofthe material is due to its high molecularweight.
   该材料的减速密度是由于其高分子量。
2. 2. The researchers found that the slowing-down density of the particles was relatedto their size.
   研究人员发现，颗粒的减速密度与其大小有关。
3. 3. The slowing-downdensity of the gases in theatmosphere is a key factor in determining theclimate.
   大气中气体的减速密度是决定气候的关键因素。