At present the research on Chinese auto-indexing mainly focuses on automatic segmentation which is a predisposal problem. 目前国内的汉语自动标引研究主要集中于汉语自动分词这个前期处理问题上。
The existence of unlisted words seriously affects the accuracy and speed of automatic segmentation of Chinese words. 未登录词的存在严重影响了汉语自动分词与自动标引的准确率和速率。