久久国产欧美日韩精品,日韩国产精品久久久久久亚洲,99视频精品全部免费免费,91精品国产综合久久走光

“伴音”的拼音為：bàn yīn...

我們家的電視出現了伴音過小的故障.There is something wrong with our TV, the sound is too low.調頻比調幅更適合于傳送立體聲、電視節(jié)目的伴音信號.FM is also Better able to transmIt'sounds in stereo than AM.木梁的吱吱聲成了井水的伴音.Squeak coming from wood beams becomes se...

...