Below the protocols layer is another agnostic interface layer that connects protocols to a variety of hardware device drivers with varying capabilities.

协议层下面是另外一个无关接口层，它将协议与具有很多各种不同功能的硬件设备连接在一起。

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Only the kernel can directly communicate with an SPU and therefore needs to abstract the hardware interface into system calls or device drivers.

只有内核才可以直接与 SPU 进行通信，因此需要将硬件接口抽象为系统调用或设备驱动程序。

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At the lowest level are the screen and input device drivers (as for the keyboard or mouse) to interact with the actual hardware.

最底层是屏幕和输入设备驱动程序(关于键盘或鼠标)来与实际硬件交互。

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