source of resonant excitation

例句：

1. 1.The sound of the piano is resonant and beautiful.
   钢琴的声音是共鸣的，很美妙。
2. 2.The resonance of the building echoed through the hall.
   大楼的回声在大厅里回荡。
3. 3.The new design has a resonant quality that catches the eye.
   新设计具有吸引人的共鸣特性。