target density

例句：

1. 1.The target density of the project is 80%.
   该项目的目标密度为80%。
2. 2. The research aims to improve the target density of the material.
   该研究旨在提高材料的密度。
3. 3. The company's target density for this year has been set at 50%.
   该公司今年的目标密度定为50%。