literature retrieval tool的用法和樣例：
例句
- Quotation Index is a new kind of retrieval means which is based on the document citation relations.
引文索引是建立在文獻引證關(guān)系之上的一種新型檢索工具。 - This tool retrieves its results from the Overture search engine so you will get the same information as the Overture Keyword Selector Tool.
這一結果從序曲檢索工具搜索引擎等你會(huì )得到同樣的資料作為序曲關(guān)鍵字選擇工具。
