This layer is sometimes referred to as the desktop layer, because it focuses on connecting client nodes to the network.

这一层有时被称为桌面层，因为它注重客户机节点连接到网络。

youdao

By aiming to have one platform run across multiple device footprints, they can leverage the support and tools from the desktop version of Ubuntu and put them into a mobile device running the same code, but with a mobile UI layer on the top.

FORBES: Ubuntu Mobile Shows The Way For The Whole CE Industry