petioli

例句：

1. 1. The plant has long petioles that help it grow taller.
   这植物有长叶子柄，有助于它长得更高。
2. 2. The scientist studied the structure of the petioles in detail.
   这位科学家详细研究了叶柄的结构。
3. 3.The tree's petioles are covered in green moss.
   这棵树的叶柄上覆盖着绿色的苔藓。