periodicit周期性, 周波periodicadj.周期的；定期的；间歇的；完句的periodic broadcast周期性广播periodic disorders周期性紊乱periodic blow down间歇放气Periodic timetable周期时刻表periodic heat flux周期热流periodic interrupt周期性中断periodic functions周期函数periodic component周期分量periodic phenomena周期现象,周期性现象periodic paralysis周期性瘫痪,周期性麻痹