periodaten.高碘酸盐
periodn.一段时间;周期;时期;课时;学时;句号;月经
period of origination萌芽期
period of ocean basin洋盆时限
periodo-hydrocarbon全碘代烃
periodontal recession[医] 牙周退缩
Period of Rex in Rome罗马王政时代
period of contraction紧缩时期
periodental membranes[医] 牙周膜
period of stimulation刺激期
period of Wei and Jin魏晋
periodontal bone loss牙周支持组织