residue class group

例句：

1. 1.The study of residues is essential for understanding the behavior of materials under extreme conditions.
   研究残余物对于理解材料在极端条件下的行为至关重要。
2. 2.The residue class group was responsible for managing the waste disposal system.
   残余类群负责管理废物处理系统。
3. 3. The residue class group was also responsible for monitoring the environmental impact of the project.
   残余类群还负责监测该项目对环境的影响。