| 释义 |
periodic/ˌpɪəriˈɒdɪk ||; ˌpɪrɪˈɑdɪk/(also periodical /-kl ||; -kḷ/) adj happening fairly regularly 定期的；定期发生的: ◇we have periodic meetings to check on progress. 我们定期开会检查进展情况。 ➔periodically /-kli ||; -klɪ/ adv ◇all machines need to be checked periodically. 所有机器都需要定期检查。 periodicsee ⇨ sometimes 2 pe·ri·od·ic /ˏpɪrɪ`ɑdɪk; ˌpɪəriˈɒdɪk◄/ also 又作 periodicaladjhappening fairly regularly but not frequently 周期性的，定期的:◇periodic attacks of flu 流行性感冒的定期爆发 |