periodic
adjective /ˌpɪəriˈɒdɪk/
/ˌpɪriˈɑːdɪk/
(also less frequent periodical
[usually before noun] /ˌpɪəriˈɒdɪkl/
/ˌpɪriˈɑːdɪkl/
)- happening fairly often and regularly
间发性的；定期的；周期的 - Periodic checks are carried out on the equipment.
设备定期进行检查。 - He makes periodic visits to all the shops which stock his products.
他定期去所有存有他产品的商店。
Collocations DictionaryPeriodic is used with these nouns:- check
- examination
- fluctuation
- …
词源mid 17th cent.: from French périodique, or via Latin from Greek periodikos ‘coming round at intervals’, from periodos ‘orbit, recurrence, course’, from peri- ‘around’ + hodos ‘way, course’. - Periodic checks are carried out on the equipment.