用bower安装angular失败

bower retry Request to https://bower.herokuapp.com/packages/angular-resource failed with ECO NNRESET, retrying in 1.5s bower retry Request to https://bower.herokuapp.com/packages/angular failed with ECONNRESET, retrying in 1.9s bower retry Request to https://bower.herokuapp.com/packages/angular-route failed with ECONNR ESET, retrying in 1.3s