== environment.d == This is a new configuration that introduced by system.d, but not widely used supported by desktop environment or display manager. It is basically the environment configuration for systemd user unit. Currently, it is only supported by GDM or Plasma 5.22+. As GDM, it means any session that login with GDM will work. As for Plasma, it means it works for Plasma regardless what DM you are using.
这是 system.d 引入的新配置，但并未得到桌面环境或显示管理器支持的广泛使用。它基本上是 systemd 用户单元的环境配置。目前，仅 GDM 或 Plasma 5.22+ 支持。作为 GDM，这意味着使用 GDM 登录的任何会话都可以工作。至于 Plasma，这意味着无论您使用什么 DM，它都适用于 Plasma。