那时我大约只有十四岁,年幼疏忽,对于卡尔·华尔德先生那天告诉我的一个真理,未加注意,但后来回想起来真是至理名言,而后我就从中得到了不可限量的益处。卡尔·华尔德是我的钢琴老师。有一天,他给我教课的时候,忽然问我,每天要花多少时间练琴。我说大约三四个小时。 At that time I was only about fourteen years old, young and negligent, unaware of one of the truths told me by Mr. Walter that day, but then I remembered it as the best of both worlds, and then I gained immeasurable benefits. Carl Wald is my piano teacher. One day, when he taught me, he suddenly asked me how much time each day would take to practice the piano. I said about three or four hours.