periodical周期: period; cycle; circle; revol ...的: 4次方是 The fourth power of 2 i ...定期: fix a date regular; at regul ...定期的;間歇的;周期的;期刊: periodical定期的: periodical; regularly; scheduled; stated; terminal; termly; timed下載手機(jī)詞典可隨時(shí)隨地查詞查翻譯