This occurs biennially, as in many fruit trees.象多种果树那样二年发生一次.This festival takes places biennially.这个节日两年过一次.Expert proposal, pillow core at least biennially is changed, bask in every week.专家建议, 枕芯至少每两年换一次, 每周都晒一次....

adv.二年一次地，每两年...

biennially的音标：biennially的英式发音音标为：[baɪ'enɪəlɪ]biennially的美式发音音标为：[baɪ'enɪrlɪ]...