highdefinitionCOCA¹⁴⁹⁶³⁶ 基本例句 un.高清晰度;🌏高画质;高解析度的沟通渠道;高解析度的通渠道 Digital TV techniques have already entered practical stage. Applications of HighDefinition TV HDTV and Standard Definition TV SDTV will existent together fora long time. 数字电视已进入实用化阶段,不同等级的数字电视业务如 HDTV和 SDTV将长期共存。 cnki