button. 那个小女孩系不上领扣.The little girl can't fasten the collar.我系不上这个领扣.I can't fasten this collar button.那个小女孩系不上领扣.The little girl can't fasten the collar button....
目的了解冻干风疹减毒活疫苗的免疫持久性.Objective To study the immunity duration of attenuated live rubella vaccine.预防接种流感活疫苗或减毒活疫苗.Influenza vaccination of live attenuated live vaccine or vaccines.乙脑减毒活疫苗对1~6岁儿童的保护率为95 98%,95%可信限为7203%~994...