| 释义 |
periodic/piəriˈɒdik/adj. 1 appearing or occurring at esp. regular intervals 周期的，(尤指)定期的 2 of or concerning the period of a celestial body (有关)天体周期的 periodic motion 天体周期运动 3 (of diction etc.) expressed in periods (see 见 PERIOD n. 7a) (措词等)完整句的 □ periodicity /-riəˈdisiti/ n.[French périodique or Latin periodicus from Greek periodikos (as PERIOD)] |