periodiden.[化]高碘化物periodn.一段时间；周期；时期；课时；学时；句号；月经periodontal health status牙周病period of a variable star变星周期Period of fruit-setting座果期period of scale expansion规模扩张期period depreciaton charge每期折旧费用period of governing Hubei[医] 肛门梳切开术period of low temperature低温季节period of communicability传染期period-luminosity curve周光曲线period of crop-rotation轮作周期