such a problem occurs when executing npm install vue-resource-- save

D:myProjecttranslate > npm install vue-resource-- save
npm err! Code ENOTFOUND
npm err! Errno ENOTFOUND
npm err! Network request to https://registry.npmjs.org/vu. failed, reas
on: getaddrinfo ENOTFOUND registry.npmjs.org registry.npmjs.org:443
npm err! Network This is a problem related to network connectivity.
npm err! Network In most cases you are behind a proxy or have bad network settin
gs.
npm err! Network
npm err! Network If you are behind a proxy, please make sure that the
npm err! Network "proxy" config is set properly. See: "npm help config"
npm err! A complete log of this run can be found in:
npm err! C:UsersAdministratorAppDataRoamingnpm-cache_logs2018-07-23T0

look at the hint that it is possible to make the network, but I can install jQuery,bootstrap and so on successfully, that is, the vue-resource installation is not successful. What"s going on? ask Daniel for help.