free-word retrieval

例句：

1. 1. The system uses a free-word retrieval algorithm to quickly find relevant documents.
   该系统使用一种自由词检索算法来快速找到相关文档。
2. 2. Free-word retrieval is a powerful tool for researchers who want to quickly access large amounts of data.
   自由词检索是研究人员用来快速访问大量数据的强大工具。
3. 3. In this study, we used free-word retrieval to identify key terms related to the topic of interest.
   在这项研究中，我们使用了自由词检索来识别与感兴趣话题相关的关键词。