periodicles期刊periodicadj.周期的；定期的；间歇的；完句的periodic abdominalgia周期性腹痛periodic unit amounts周期单元数periodic disturbances周期性干扰periodic wave solution周期波解Periodic Brugia malayi周期型马来丝虫periodic safety report定期汇总表periodic unsteady flow周期性非定常流动periodic trial balance期末试算表periodic communication周期通信periodic reinforcement定时强化

1. A wave that repeats, like the one above, is called a periodic wave.
   如上图所示的周期性的波，称之为周期波。