And so whenever you heard any note at all -- if I just play a random note --  -- you knew instantly what it was, and you'd got the ability as well to find that note on the piano.
所以每当你听到音符 如果我随机地弹奏一个音符  你马上就知道那是哪个音， 并且能够马上在钢琴上找到那个音