His inventions and innovations included batteries, cement mixer, the sound recording telephone, double- and multi-type cable system, railways used brakes.

他的发明和革新包括蓄电池、水泥搅拌机、录音电话、双工式和多工式电报系统、铁路用制动器等。

Section 3 Sound Recording and Video Recording.

第四章出版、表演、录音录像、播放第三节录音录像。

What before the sound recording should you make?

录音前你应该做什么呢？

The musical records have two forms of music and sound recording.

而“艺术形象与乐声”一体化记录的方式包括有声电影和电视。

The first sound recording ever made: "Mary Had a Little Lamb" in 1877.

最早的录音：“玛丽有只小绵羊”录于1877年。