Alright, the third type and final type is spina bifida occulta, and this is the most common and most mild form of spina bifida.

第三种，也是最后一种，叫做隐性脊柱裂；这是最常见同时也是最轻微的脊柱裂类型。

In spina bifida occulta, the spinal cord and surrounding tissue don't protrude, nor is any of the tissue forced into the spaces in between the vertebrae.

在隐性脊柱裂中，脊髓和周围组织均不突出，也没有任何组织被挤压到椎骨之间的空间。