An expository term paper is one that a pupil writes with the primary objective of informing the reader.

一种解释性的论文是一个小学生写的主要目的是告诉读者。

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Although his formal education stopped after primary school, he was an avid reader.

尽管他在小学毕业后就没上过正规的学校，但他是一个酷爱读书的人。

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The primary work of this thesis is about designing and realization of Preventing-Forgery Code Reader. It includes the hardware system designing;

本文的研究工作主要围绕着读码器的设计与实现展开，文中阐述了读码器硬件部分的设计；

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With its impressive array of primary sources, the China Reader is invaluable for novice students of China and a solid reference for longtime observers.

CNN: ASIANOW - TIME Asia

So, a resilient design would allow for any of those individual modules to fail gracefully without blocking the reader from completing the primary action on the site reading news.

FORBES: Website Failures Are Inevitable, But They Need Not Be Ugly

Yes, shocked reader, Katie uses direct mail as her primary way of drumming up business.

FORBES: OMG...She Doesn't Even Tweet?