biennially [baɪ'enɪəlɪ]

以下由轻松背单词网站提供

附加级

adv.二年一次地，每两年

This occurs biennially, as in many fruit trees. 象多种果树那样二年发生一次。来自辞典例句
This festival takes places biennially. 这个节日两年过一次。来自互联网