If you touch the string gently, it vibrates at a fixed rate ( in other words, at a fixed frequency), but the distance between the top and bottom of the area in which it vibrates is small.

• 如果你轻轻地拨动琴弦， 琴按照固定的频率来震动（换言之，其频率是固定的），但它从顶部到底部的震动区域的范围是小的。