每两年的春天，许多英国人就会戴上红鼻子，做一些让自己和别人发笑的“傻事”。

Every two years in spring, many English people put on a red nose, make a fool of themselves and do "silly" things to make themselves and others laugh.

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在某种程度上，这次仓促的决定归因于空间的时间周期：行星之间的这种排列导致大约每两年的时间才会出现以相对较少能源环绕的“过渡轨道”。

In part, this rush was down to cosmic timing: the alignment of planets that permits an energy-saving "transfer orbit" only comes around every two years or so.

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我们的车每两年更换一次。

We change our car every two years.

《牛津词典》

The Framingham Study was perfect for that because you had these bi-annual assessments.

弗明汉研究数据对我们的研究很有帮助,除了每两年一次的评估数据

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

Now in the case of The Framingham Study they did bi-annual assessments, every two years brought people into the lab and got very careful measures on them, so a lot of what we initially knew about diet and health, smoking and health, and other things came from The Framingham Heart Study.

弗明汉研究每两年做一次评估,每两年在实验室里对研究对象,进行十分仔细的检测,我们对饮食与健康,吸烟与健康以及其他的了解,最初都来自于弗明汉心脏研究

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选