That ever-expanding content is the crux of the social studies teacher's dilemma: How to cover every topic with limited class time?
不断扩大的教授内容是让社会老师进退两难的难题：如何在有限的课堂时间里做到面面俱到呢？
Think like a "content DJ" : use and reuse your content in many different formats: blog posts, email, newsletters, articles, PDFs, press releases, case studies, video, and social media updates.
以“内容DJ”的方式思考：把手上的内容以不同的形式重复利用：博客文章、邮件、新闻邮件、文章、P DF、新闻稿、案例分析、视频以及社区媒体更新。
His studies of Zhouyi constitute a basic structure and content of the bibliography of ancient China's social history.
闻一多的《周易》研究构成了中国古代社会史史料学基本体系和内容。
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