third-generation
adjective [ before noun ] uk/ˌθɜːd.dʒen.əˈreɪ.ʃən/ us/ˌθɝːd.dʒen.əˈreɪ.ʃən/ (abbreviation 3G)
（尤指移动电话的）第三代技术
Third-generation technology is new and improved, especially mobile phones on which you can use the internet, watch television, etc.