periodic
英
/ˌpɪəriˈɒdɪk/
美
/ˌpɪriˈɑːdɪk/
adj.
周期性；周期的；定期的；间发性的
派生词： periodically adv.
例句
Periodic checks are carried out on the equipment.
设备定期进行检查
These arrangements are subject to periodic reviews.
这几项安排每隔一定时间须予复查。
Silicon is one of the most studied elements in the periodic table.
硅是周期表中最熟悉的元素之一。
