This festival takes places biennially .
这个节日每两年有一次。
This occurs biennially, as in many fruit trees.
象多种果树那样二年发生一次。
Faecal occult blood testing had to be repeated (annually or biennially).
粪便潜血检查需要重复进行(每年一次或每两年一次)。
From the 7th volume, itbeen published in the first quarter of even year biennially.
从第七卷开始，每两年一卷逢双年的第一季度发行。
With the IAAF athletic competition rules being revised biennially, modern athletic competition became more and more benefit to athlete to achieve the best performance.
随着国际田联《田径竞赛规则》每两年修改一次，现代田径竞赛越来越有利于运动员创造优异的运动成绩；
Produced biennially by the staff of Hydrocarbon Processing magazine, this handbook-type industry reference source, now on CD-ROM, contains more flow diagrams and descriptions then ever before.
由烃的人员(处理杂志)两年一次生产，这个手册类型工业参考消息，现下在CD - ROM上，那么以往任何时候包含更多的流程图和说明。
Produced biennially by the staff of Hydrocarbon Processing magazine, this handbook-type industry reference source, now on CD-ROM, contains more flow diagrams and descriptions then ever before.
由烃的人员(处理杂志)两年一次生产，这个手册类型工业参考消息，现下在CD - ROM上，那么以往任何时候包含更多的流程图和说明。
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