为了检索和写引文方便,本刊从2003年元月起编排卷期号,2003年为第9卷,此前每年一个卷号,每期一个期号。现卷期号与原期号关系如下:1995年第1卷,期号1～3期(总期1～3);1996年第2卷,期号1～4(总期号4～7);1997年第3卷,期号1～4期(总期8～11);1998年第4卷,期号1～6(总期号12～17); In order to retrieve and write citation convenience, this issue from January 2003 numbered volleys, in 2003 for Volume 9, after a volume number each year, a period of each issue. The current issue of the number and the original issue of the following issues: 1995 Volume 1, the period of 1 to 3 (the total period of 1 to 3); Volume 2 in 1996, the period of 1 to 4 (the total of 4 to 7) ; Volume 3, 1997, Issues 1 to 4 (total 8 to 11); 1998, Volume 4, Issues 1 to 6 (the total of 12 to 17);