CASIA phrase-based SMT system for IWSLT’07 Yu Zhou author Yanqing He author Chengqing Zong author 2007-oct 15-16 text Proceedings of the Fourth International Workshop on Spoken Language Translation Trento, Italy conference publication zhou-etal-2007-casia https://aclanthology.org/2007.iwslt-1.5/ 2007-oct 15-16