主题途径是文献检索的一种主要的检索途径，是指通过文献资料的内容主题进行检索的途径，它依据的是各种主题索引或关键词索引，检索者只要根据项目确定检索词（主题词或关键词），便可以实施检索。
《中图法》只提供分类检索途径，《冒号分类法》既可从分类途径又可从主题途径进行检索。
The Chinese Library Classification can only provide classification retrieving while the Colon classification can be used to retrieve both by classification and by theme.
现在就应该投入一部分时间来评测各宣传途径的效果，包括公司广告、直邮宣传、促销材料、以及网站等，确保它们所传达的主题统一，令人心动。
Take time now to review and evaluate the messages in your advertisements, direct-mail campaigns, sales materials and on your website to be sure they present an effective, unified theme.
我们选择这一主题，以便强调拥有足够的卫生工作者的重要性，并且寻找途径培训和招聘更多的卫生工作者。
We chose this theme to emphasize the importance of having enough health workers, and to find ways to train and recruit more of them.
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