active GIS主动GISactiveadj.活跃的；积极的；起作用的；灵活的active body temperature活动体温active knowledge-base主动知识库active nutation control主动章动控制active financial policy积极财政政策active detection system有源检测系统Active magnetic beating电磁轴承active balance of trade贸易顺差active phase of uranium活动态铀active picture elements有效象素active longitude region活动经度