儿子:当你看到这封信时,你已在我万里之外,我则在你地球的另一端。地球很大,我们太小了,但我们不甘于小,我们要超过地球,所以你出发了。这是一次蓄谋已久的远行,为了这一天,我们都用了十八年的时间作准备;这也是你命中注定的一次远行,有了这一天,你的人生才可能走得更远。我没有到过费城,但可以想象,那边的月亮不会比杭州的大,或者小;那边的 Son: When you see this letter, you are already within my own being, and I am on the other end of your earth. The earth is very big, we are too small, but we are unwilling to be small, we have to surpass the earth, so you set out. It’s a long-awaited journey, and for that day we have spent 18 years preparing for it; it’s also a fateful long-distance trip to you, and on this day your life may go further . I have not been to Philadelphia, but it is conceivable that the moon over there will not be bigger or smaller than that of Hangzhou.