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...
No running, no chasing, no littering, no smoking and no eating.场内不准奔跑 、 追逐, 不准乱扔杂物 、 吸烟及饮食任何形式的食物.She was silent for a while, lost in thought, staring at the books littering the room.一时间她默不作声，直想得入了神，双眼直愣愣地盯着房间里扔得到处都是的书。I...