periodic

adj. /ˌpɪr.iˈɑː.dɪk/ B2

周期的；定期的

Happening repeatedly at regular intervals of time.

仙境例句

The old eel made periodic visits, coming once a week to teach Drawling.

那条老鳗鱼定期来访，每星期来一次，教大家慢吞吞地说话。