- Pc.rar: Twrp-3.3.1-0108-dx

: Often stands for "DingXian" (a well-known developer/compiler of TWRP builds in the Chinese community).

: This usually implies the file is a toolkit meant to be run from a PC (via Fastboot) to install the recovery, rather than a standalone image file to be flashed within Android. TWRP-3.3.1-0108-DX - PC.rar

The proper text for refers to a specific custom recovery file, likely for a Chinese-market smartphone (often Xiaomi or Redmi devices) . If you are looking to flash this, ensure

If you are looking to flash this, ensure it is specifically made for your device's codename. Using a TWRP build compiled for a different model can "brick" your phone. the custom recovery software.

: Team Win Recovery Project, the custom recovery software. 3.3.1 : The version of TWRP. 0108 : The release date (likely January 8th).

: A compressed archive containing the installer and the recovery image.