grouping of variables

例句：

1. 1. The students are grouped into different teams for the competition.
   学生们被分成不同的团队参加比赛。
2. 2. The team decided to group together and work on a project.
   团队决定一起工作，完成一个项目。
3. 3.The researchers found that the grouping of species had an impact on their survival rates.
   研究人员发现物种的分组对他们的生存率有影响。