hind limb bud

例句：

1. 1. The baby rabbit is growing its hind limb buds.
   小兔子正在长后肢芽。
2. 2. The researcher found that the hind limb buds were affected by the environmental factors.
   研究人员发现后肢芽受环境因素影响。
3. 3. The growth of hind limb buds is crucial for the development of the animal's body.
   后肢芽的生长对动物身体的发展至关重要。