The primary election in New Hampshire was the first step of the presidential nominating process.

VOA: special.2009.08.30

One of the primary characters in this whole scientific process is a researcher at Harvard named Walter Willett.

这项活动中的一个领军人物就是,哈佛一位名为沃尔特·威莱特的研究者

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选