branch migration

例句：

1. 1. The species is undergoing a period of branch migration.
   这个物种正处于一次分支迁徙期。
2. 2. The researchers are studying the effects of branch migration on the ecosystem.
   研究人员正在研究分支迁徙对生态系统的影响。
3. 3. The migration patterns of birds during spring migration are influenced by branch migration.
   春天鸟类的迁徙模式受到分支迁徙的影响。