分枝

例句：

1. 1. The tree hasmany branches reaching out to the sky.
   这棵树有很多枝条伸向天空。
2. 2. The branchof science that deals with the environment iscalled ecology.
   与环境相关的科学分支被称为生态学。
3. 3. The branch of the forestthat grows above the ground is called arbor.
   生长在地面以上的森林分支叫做灌木。