请使用OpenNLP当中的英文文档，en-sent.bin 以便进行英文断句。 请使用OpenNLP当中en-token.bin 以便进行英文单词的tokenlization. 系统的启动代码名称是Command collect center-NGram Model based on add-delt smooth tec. the datastructure of NGram model s memony structure is using prefix tree as inde