2. "If words sound good on your fingers, why not listen to them on your fingers?" What does he mean: (Why).
If the sound is on your finger, why not just listen to it?
3. The question Su Shi pondered in this poem is: (Where did the piano sound come from), can you give him an answer with your own scientific knowledge?
Many things complement each other, just like water and stones are still lives, but they can make sounds when they touch each other.