我尝试通过以下命令使用 apt-get 安装python3-venv软件包：
sudo apt-get install python3-venv
但我收到一些错误：
Reading package lists... Done
Building dependency tree
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:
The following packages have unmet dependencies:
python3-venv : Depends: python3.5-venv (>= …