核心问题
（1）Folk music has been passed down from one generation to another.
(2) In this way stories were passed on from one person to another.
pass down 与 pass on 有无区别?
词典解答
上面句子里 pass down 和 pass on 都作“把……传给后代、传给后来人”解，可以看作是同义词语。
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This custom has been passed down since the 18th century. 这个习俗是18世纪传下来的。
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This ring has been passed on in my family from mother to daughter. 这枚戒指在我家是母传女传下来的。