我在正式受聘任教哈佛之前,先来访问两次,每次一学期,以便作一个最后决定。第一次访问时间是1992年秋季,次年秋季再由西岸回来访问一学期,直到1994年才正式上任。因为每次访问时间都不长,所以由系方安排住在学生宿舍的一套专为访问学者居住的客房,令我大开眼界。原来哈佛本科生 Before I was formally hired to teach Harvard, I visited two times, one semester each, in order to make a final decision. The first visit took place in the fall of 1992, the second year of the fall, followed by one more sessional visit from the West Bank and no official appointment until 1994. Since each visit did not last long, I arranged an open room for visiting scholars in the student dormitories arranged by the department. The original Harvard undergraduate