diàn xué : lián wǎng : diàn chí > biāo zhǔn qīng diàn shì
nínshìfǒuzàixúnqiú:标准标准清晰度电视标准 标准清晰度电视gèngduōjiéguǒ...
yīngwénjièshì:
  1.   Standard Definition TV (SDTV)
  2.   standard definition television (sdtv)