ventral cornu

例句：

1. 1.The ventral cornu of the turtle is a distinctive feature.
   乌龟的腹侧角是一个独特的特征。
2. 2. The ventral cornu helps to support the head and neck muscles.
   腹侧角有助于支撑头部和颈部肌肉。
3. 3.The ventral cornu of the turtle is used for protection during hibernation.
   乌龟的腹侧角在冬眠期间起到保护作用。