conda安装成功，添加频道试了清华镜像，北外镜像以及官方，均报错，
CondaHTTPError: HTTP 000 CONNECTION FAILED for url <https://mirrors.bfsu.edu.cn/anaconda/cloud/pytorch/linux-64/current_repodata.json>
Elapsed: -
An HTTP error occurred when trying to retrieve this URL.
HTTP errors are often intermittent, and a simple retry will get you on your way.
'https//mirrors.bfsu.edu.cn/anaconda/cloud/pytorch/linux-64'
