biennial相关的词根或词缀是: annenn

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The plant is biennial and bears flowers during second year of life .

这种植物是每两年一次，而且在第二年的时候开花。

The biennial nuclear security summit is a cornerstone of his broader strategy .

两年一次的核安全峰会是奥巴马更广泛战略的一个重要组成部分。

The nsf has just released its biennial report on global investment in science , engineering and technology .

美国国家科学基金最近发布了其两年一次的全球科学工程技术投资报告。

The lack of private sector involvement in the sector was on display during november 's biennial zhuhai airshow .

国防业缺乏私营企业参与，在去年11月举行的两年一次的珠海航展上得到了展示。

America 's federal trade commission has already forced facebook to submit to a biennial external audit of its privacy policy and procedures .

美国联邦贸易委员会已经要求facebook提交一份针对它的隐私政策和程序的两年一次的外部审计报告。