variationaladj.变化的；变化性的；因变化而产生的variationn.变种；变奏曲；变动；变化variation principle变分原理variation of tunnel隧道变异variation functions变异函数variational systems变分系统variation knowledge变异知识variation parameter变参数variation stability变差稳定性variation cofficient变异系数variational notation变分记号variation of azimuth方位变化