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pe·ri·od·i·cal AHD[pĭr'ē-ŏdʹĭ-kəl] D.J.[ˌpɪriːˈɒdɪkəl]K.K.[ˌpɪriˈɑdɪkəl]adj.（形容词）- Periodic.周期性的
- Published at regular intervals of more than one day.期刊：以长于一天的固定间歇出版的
- Of or relating to a publication issued at such intervals.期刊：属于或关于一种以这种周期出版的
n.（名词）- A publication issued at regular intervals of more than one day.期刊：以多于一天的周期定期出版的出版物
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