main branch connections

例句：

1. 1. The main branch connectionsof the tree are essential for its survival.
   树的主干分支对于其生存至关重要。
2. 2. Maintrunk connections are crucial for the stability ofthe forest ecosystem.
   主干分支对于森林生态系统的稳定性至关重要。
3. 3. In the construction industry, mainbranch connections are used to connect different sectionsof a building.
   在建筑行业中，主干分支用于连接建筑物的不同部分。