You can, for example, this is being used for an USB mass storage device.

例如，您可以将其用于 USB 大容量存储设备。

Is that a mass storage device? Is that a USB serial adapter? Is that a switch? Whatever.

那是大容量存储设备吗？那是USB串行适配器吗？那是一个开关吗？任何。

There is a boot ROM that loads code from a mass storage device like an eMMC.

有一个引导 ROM，可从 eMMC 等大容量存储设备加载代码。

If you plug in a USB mass storage device, it's going to have multiple bulk endpoints where you speak some SCSI protocol over it.

如果你插入一个 USB 大容量存储设备，它将有多个批量端点，你可以通过它使用一些 SCSI 协议。

And then you can talk to this thing and you can reflash the eMMC or whatever mass storage device you have on your board or on your device where the operating system lives.

然后你可以与这个东西交谈，你可以重新刷新 eMMC 或你的主板或操作系统所在设备上的任何大容量存储设备。

Get descriptor is also being used that's for the identification of the device, what kind of device is that, is that a mass storage device, is it a mouse, is it a keyboard, and so on.

获取描述符也被用于识别设备，这是什么类型的设备，是大容量存储设备，是鼠标，是键盘，等等。