虚包：dbus-session-bus
This is a virtual package. See the Debian policy for a definition of virtual packages.
负责填实 dbus-session-bus 的软件包
- dbus-user-session
- 简单的进程间消息系统（systemd --user 集成）
- dbus-x11
- simple interprocess messaging system (X11 deps)
This is a virtual package. See the Debian policy for a definition of virtual packages.