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。

The inner layer of the meninges is the pia mater, the middle layer is the arachnoid mater and the outer layer is the dura mater.

最内一层脑膜叫软脑膜，中间一层叫做蛛网膜，最外面一层叫硬脑膜。

The outer layer of the meninges is the dura mater, the middle layer is the arachnoid mater, and the inner layer is the pia mater.

脑膜的外层叫硬脑膜，中间层叫蛛网膜，内层则叫软脑膜。

The inner layer of the meninges is the pia mater; the middle layer is the arachnoid mater; and the outer layer is the dura mater.

最里面一层叫做软脑膜；中间一层叫做蛛网膜；最外面一层叫做硬脑膜。