silver surfer

 Longman Dictionary of Contemporary English 5++朗文当代英语 5++LDOCE 5++朗文 5++ˌsilver ˈsurfer noun [countable] informal  an old person who uses the Internet 银发网民 Many silver surfers use the Internet to keep in touch with their grandchildren. 许多老年网民利用因特网和他们的孙辈保持联系。

ˌsilver ˈsurfer nounChineseSyllable  

silver surfer
ˌsilver ˈsurfer noun [countable] informal
an old person who uses the Internet:
    Many silver surfers use the Internet to keep in touch with their grandchildren.

silver surferBrE /ˌsɪlvə ˈsɜːfə(r)/ 🔊NAmE /ˌsɪlvər ˈsɜːrfər/ 🔊 noun (informal) an old person who spends a lot of time using the Internet 银发网民（指经常上互联网的老年人）