| 词汇 | periodic |
| 释义 | periodic 2 ENTRIES FOUND: periodic (adjective) periodic table (noun) periodic /ˌpiriˈɑːdɪk/ adjective periodic /ˌpiriˈɑːdɪk/ adjective Learner's definition of PERIODIC always used before a noun : happening regularly over a period of time间歇的；周期性的 He takes the car in for periodic oil changes.他定期把汽车送去更换机油。 She makes periodic [=regular] payments to the bank.她定期到银行付款。 — periodically /ˌpiriˈɑːdɪkli/ adverb The directory is updated periodically.电话号码簿定期更新。 |
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