Officially opened in1990 , the FIZ continues to increase its range of activities .
1990年该中心正式成立，并一直留心扩大其活动范畴。
At the end of distraction , microvessel density was decreased from microcolumn formation ( MCF ) zone to fibrous interzone ( FIZ );
牵张结束时，血管密度由骨小梁形成区带（MCF）向纤维区带（FIZ）递减；
fiz