periodicallyadv.周期性地;定期地
periodicaln.期刊adj.定期的
periodically corrugated surface周期折皱表面
periodical editorial department期刊编辑部
periodically collapsing bubbles周期性破灭泡沫
periodically deformed waveguide周期性畸变波导
periodical department directors期刊部主任
periodically changing potential周期变化势
periodical administration model期刊管理模式
Periodical survey of cargo gear货物装卸设备定期检验