On an acoustic guitar, the strings vibrate and the hollow part of the instrument, or the sound box,also vibrates.

VOA: special.2009.09.27

All of the sounds are produced by the strings on the instrument and how the bow is pulled across the instrument.

所有声音都是靠乐器上的弦产生的,琴弓在乐器上来回滑动发声

耶鲁公开课 - 聆听音乐课程节选

Les Paul wanted an instrument in which only the strings vibrated.

VOA: special.2009.09.27