They acquire the reproduction healthy knowledge mainly coming from the television, broadcast, books and periodical magazines.
她们获得生殖健康知识的途径，主要来自电视广播和书刊杂志。
Therefore, the magazines need to create a broader market space periodical by the minimum cost of sales.
因此，期刊社要以最少的销售成本开创更广阔的市场空间。
Of the non-periodical publications, books constitute by far the largest class; Periodical publications divide further into two main classes, newspapers and magazines.
在不定期出版物中，图书目前占了最大比例；定期出版物又再分两大类：报纸和刊物。
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