stone-age
adjective informal, dispproving uk/ˈstəʊnˌeɪdʒ/ us/ˈstoʊnˌeɪdʒ/
十分基础的；粗浅的；不成熟的
used to describe something that is very basic, simple, and not well developed
The organization is criticized for its surly service and stone-age software. 这家机构因其恶劣的服务态度和落伍的软件系统而受到批评。