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 to start training始训年龄agerelated alteration年龄相关变化age of river terraces河流阶地年代age-diffusion model年龄扩散模型agencies of tendering招标代理机构age-related disease老化伴随病Age-related changes老年改变age- related changes年龄相关变化Age - related change发病年龄agenesis of epiglottis会厌发育不全