periodic
柯林斯词典
1. ADJ Periodic events or situations happen occasionally, at fairly regular intervals. 周期性的
Periodic checks are taken to ensure that high standards are maintained. 进行周期性检查以确保高标准得以维持。
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periodic /ˌpɪərɪˈɒdɪk/
剑桥词典
- happening repeatedly over a period of time
周期（性）的；定期的
He suffers periodic mental breakdowns . 他周期性地精神失常。 返回 periodic