periodically

• 副词，表示“每隔一段时间”或“定期地”，也可表示“偶尔、不时地”。描述按一定时间间隔重复发生、常带有可预测或计划好的周期性。

An adverb meaning "at regular intervals" or "from time to time." It describes actions or events that occur repeatedly over a period of time, often with a predictable or scheduled pattern.

1. At regular intervalsB2formal

   Occurring or happening repeatedly with a fixed or predictable time between occurrences.

   定期地

   • The equipment is checked periodically to ensure it is working properly.
   • She visits her dentist periodically for a check-up.
   • The newsletter is published periodically, usually every month.

   同义词evenlyrecurrentlyregularlyrhythmicallysteadilysystematically

   反义词infrequentlyirregularlyrandomlyrarelysporadically

2. From time to timeB2formal

   Occurring occasionally, but not necessarily at fixed intervals.

   定期地

   • Periodically, the team reviews its progress.
   • He periodically checks his email for important messages.
   • The system updates itself periodically to fix bugs.

   同义词at timesfrom time to timeintermittentlynow and againoccasionallyon occasiononce in a whilesometimessporadically

   反义词alwaysconstantlycontinuouslyever