random sea不规则波海面randomadj.任意的；随机的；随意的n.随意；任意adv.随机地random blocks design随机区组设计random breeding unit随机育种单位random moving target随机运动目标random motion errers随机运动误差random file rollback随机文件重算random record number随机记录号random censored data极大似然估计random access memory随机访问存储器random time interval随机时段random load spectrum随机谱