code: private static List<List<String>> convertSentenceListToDocument(List<String> sentenceList)
      {
          List<List<String>> docs = new ArrayList<List<String>>(sentenceList.size());
          for (String sentence : sentenceList)
          {
              List<Term> termList = StandardTokenizer.segment(sentence.toCharArray());
              List<String> wordList = new LinkedList<String>();
              for (Term term : termList)
              {
                  if (CoreStopWordDictionary.shouldInclude(term))
                  {
                      wordList.add(term.word);
                  }
              }
              docs.add(wordList);
          }
          return docs;
      }
docs: 将句子列表转化为文档
  
  @param sentenceList
  @return