Alright, the second type of spina bifida is meningocele, sometimes called a meningeal cyst.

第二种类型的脊柱裂是脊膜膨出型，有时也称为脊膜囊肿。

The outer membrane is the dura mater, which forms the meningeal folds, such as falx cerebri and tentorium.

最外层的硬脑膜可以形成脑膜折叠结构，比如大脑镰和小脑幕。

These two layers of the dura mater travel together, but at certain spots, the internal layer of the dura mater separates from the external one to form the meningeal folds.

两层硬脑膜共同运动，但在某些地方，硬脑膜内层和外层分开，形成一些脑膜折叠。