长按 USB Key 上的按键并插入计算机，待绿灯常亮并出现名为 MDK-DONGLE 的可移动磁盘设备。下载并拷贝 此文件 到盘符下，拷贝完成后系统将会出现名为 OpenSK 的设备。
如果你始终没有看到 MDK-DONGLE ，也许你应该试试 升级到 UF2 Bootloader。
Press and hold the button on the USB Key and insert it into the computer, wait until the green light turns on and the removable disk device named MDK-DONGLE appears. Download and copy this file to the drive, and when the copy is complete, a device named OpenSK will appear.
If you never see MDK-DONGLE, maybe you should try Upgrade to UF2 Bootloader .
如果你还没有 Makerdiary RF52840 MDK USB Dongle，你可以在这些地方买到：
If you don't already have the Makerdiary nRF52840 MDK USB Dongle, you can get it at these places:
Makerdiary: How to Buy nRF52840 MDK USB Dongle
此项目不隶属于 Google OpenSK 或 Makerdiary，也未受到他们的认可 / This project is not affiliated with, or endorsed by, Google OpenSK or Makerdiary