AGEN自身红细胞凝集试验agen.年龄；时代；时期；长时间v.（使）变老；（使）陈化age of a mutant gene突变基因寿命Age-related change年龄相关变化agebased maintenance定期检修agenda establishment议程设置age of digital media数字媒体时代Agena control system阿琴那控制系统age at first calving初产日龄ageostropic Q vector非地转Q矢量age dependency ratio受供养人口年龄比率age variability unit年龄差异单位