The external layer of the dura mater adheres to the inner surface of the skull.

硬脑膜外层则紧贴在颅骨内面。

They all have a dense, smooth-looking external layer of compact, or cortical bone around a porous, honeycomb-looking area of spongy bone.

它们都有致密、光滑的外层致密或皮质骨，围绕着多孔、蜂窝状的海绵骨区域。

Between the external layer of the dura mater and the inner surface of the skull, there are arteries that supply the meninges.

在硬脑膜外层和颅骨内面之间，有脑膜的供血动脉。

Compact bone tissue on the other hand is quite dense, with no visible spaces. It forms the external layer of your bones and stores calcium for bone cells to use to make more tissue.

骨质致密，没有可见的空隙，形成骨骼的外层，储存钙，供骨细胞用来制造更多的组织。

Also, human bricklayers are still likely to be needed in some capacity at least for now - to complete those external layers or for when more detailed or bespoke brickwork is required.

此外，至少目前仍可能需要某些能力的人工砌砖工——完成这些外层，或者在需要更详细或定制的砌砖时使用。