core branch

例句：

1. 1. The company's core branch is responsible for managing the production process.
   公司的核心技术部门负责管理生产过程。
2. 2. The team's main branch is working on developing a new software program.
   团队的主要分支正在开发一个新的软件程序。
3. 3. The research group's key branch is focused on studying the effects of climate change.
   研究小组的关键分支专注于研究气候变化的影响。