posterior basal branch

例句：

1. 1. The tree'sposterior basal branch is covered in green moss.
   这棵树的后基部分支覆盖着绿色的苔藓。
2. 2. The scientist studiedthe structure of the posterior basal branch ofthe tree.
   这位科学家研究了树的后基部分支的结构。
3. 3. The researcher found that the posteriorbasal branch was essential for theplant's survival.
   研究员发现后基部分支对植物的生存至关重要。