limb bud

例句：

1. 1. The baby is starting to grow its limb buds.
   婴儿开始长出肢体芽了。
2. 2. The tree's limb buds are showing signs of growth.
   这棵树的肢体芽正在生长的迹象。
3. 3.The scientist observed the limb buds of the plant growing in the lab.
   科学家在实验室里观察了植物的肢体芽生长的情况。