尽管我一直只供职于一所大学，我在伯克利、得克萨斯大学奥斯丁分校、伦敦帝国学院做过整学期的访问学者，而且还对全世界无数学校和研究机构进行过短期访问。

• Even though I had only worked for one university in my entire career, I did spent semester long sabbaticals in residence in UC Berkeley, U.Texas Autstin, Imperial College in London and short visits to countless scholarly institutions around the world.