利用镜像安装指定版本的pytorch,torch、torchvision、torchaudio
pip install torch==1.11.0 torchvision==0.12.0 torchaudio==0.11.0 -i https://mirrors.aliyun.com/pypi/simple --trusted-host mirrors.aliyun.com
pip install torch==1.11.0 torchvision==0.12.0 torchaudio==0.11.0 -i https://mirrors.aliyun.com/pypi/simple --trusted-host mirrors.aliyun.com