转自:http://blog.csdn.net/wbgxx333/article/details/38986507
本文是翻译Speech and Language Processing: An introduction to natural language processing, computational linguistics, and speech recognition. Daniel Jurafsky & James H. Martin.Copyright c 2006, All rights reserved. Draft of June 25, 2007
第九章第7节的内容,这个也是接着上篇博文的不懂的继续往下写。希望你可以有所收获。