Anaconda的默认源：
https://repo.anaconda.com/pkgs/main https://repo.anaconda.com/pkgs/r https://repo.anaconda.com/pkgs/msys2
用法：
conda config --add channels https://repo.anaconda.com/pkgs/main conda config --add channels https://repo.anaconda.com/pkgs/r conda config --add channels https://repo.anaconda.com/pkgs/msys2 conda config --set show_channel_urls yes
然后在Anaconda Navigator中删除其他源即可。
