http://www.ep-china.net/academia/experts/column/ZhuYongxin.htmhttp://cache.baidu.com/c?word=%D0%C2%3B%BD%CC%D3%FD%3B%D6%AE%3B%C3%CE%2C%CF%C2%D4%D8&url=http%3A//www%2Ewanfangdata%2Ecom%2Ecn/qikan/periodical%2EArticles/zgdxjx/zgdx2003/0302/0302ml%2Ehtm&b=0&a=1&user=baidu#0要注册的!