external branch

例句：

1. 1. The tree's growth is influenced by the external branches that grow from its roots.
   树木的生长受到从根部生长出来的外部分支的影响。
2. 2. The company's expansion plans include the external branching out into new markets.
   公司的扩张计划包括向新的市场扩展。
3. 3. The research team identified several external branches of the disease that could be targeted for treatment.
   研究团队确定了几种可能作为治疗目标的疾病外部分支。