| 单词 | 发生一次 |
| 释义 | 〔septennial〕An event that occurs every seven years.每七年发生一次的事件〔biennial〕An event that occurs every two years.每两年发生一次的事〔quadrennial〕Happening once in four years.每四年发生一次的〔septennial〕Occurring every seven years.七年一次的：每七年发生一次的〔secular〕Occurring or observed once in an age or a century.长久的：一个时代或世纪才发生一次或被观测到的〔bicentennial〕Happening once every 200 years.每二百年发生一次的〔quindecennial〕Occurring once every 15 years.每十五年发生一次的〔quinquennial〕Happening once every five years.每五年发生一次的〔centenary〕Occurring once every 100 years.百年一次的：每一百年发生一次的〔menstrual〕Taking place on a monthly basis.每月发生一次的〔triennial〕A ceremony or celebration occurring every three years.每三年发生一次的事件、仪式或庆祝活动〔bimestrial〕Occurring every two months; bimonthly.一月两次的：每两个月发生一次的；一月两次的〔semidiurnal〕Occurring or coming approximately once every 12 hours, as the tides.一天两次的：近乎每12小时出现或发生一次的，如潮汐〔horary〕Occurring once an hour; hourly.每小时的：每一小时发生一次的，每小时的〔biennial〕Happening every second year.每两年发生一次的〔bimonthly〕Happening every two months.每两个月发生一次的〔vicennial〕Happening once every 20 years.每二十年发生一次的 |
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