What is in question is not the retrieval of an absolute, fixed or "true" meaning that can be read off and checked for accuracy, or some timeless relation of the text to the world.
However, traditional Search Engine adopts full-textretrieval technique based on keyword match, and it results in having no all-sided retrieval result and more outlying information.
然而由于传统的搜索引擎基本上都是采用基于关键词匹配的全文检索技术，导致检索结果不全、无关信息过多。
3
Moreover, digital library has the function of textretrieval with images.