grouping of equations

例句：

1. 1. The researchers analyzed the data and grouped it into different categories.
   研究人员分析了数据，并将其分成不同的类别。
2. 2.The engineers organized the tools according to their function, grouping them by type.
   工程师根据工具的功能将它们分类，按类型组织。
3. 3. The students were divided into groups for discussions, ensuring a more effective learning experience.
   学生们被分成小组进行讨论，以确保更有效的学习体验。