Historians use a wide range of primary and secondary sources for their research.

历史学家在研究中使用大量的原始资料和二手资料。

《牛津词典》

I entered a primary school.

我上了一所小学。

youdao

Yes, they are at a primary school.

是的，他们上小学。

youdao

In 2009,Sierra Leone President Ernest Bai Koroma launched a review of the education system following abysmal exam results at both the primary and secondary level.

VOA: standard.2010.02.25

There's a difference between the primary and general election.

在初选和大选中也存在着区别

耶鲁公开课 - 博弈论课程节选

And in any event, our primary concern is with the program of the texts as they stand before us: is there a symbolism operating here?

无论如何，我们主要关心的，是摆在我们眼前的,这些计划大纲：存在象征主义吗？

耶鲁公开课 - 旧约导论课程节选

In this week's Illinois primary a third of the Republican vote went to other candidates, notably John McCain (even though he has withdrawn).

ECONOMIST: Corruption in Illinois

Senator Hillary Clinton made her first trip as a presidential candidate to New Hampshire, home of the nation's first presidential primary a year from now.

NPR: Sen. Clinton Takes a New Hampshire Tour

Edwards had called that primary a must-win contest.

CNN: Exit polls: Economy a chief concern