ENGtube: an Integrated Subtitle Environment for ESL Chi-Ho Li author Shujie Liu author Chenguang Wang author Ming Zhou author 2011-sep 19-23 text Proceedings of Machine Translation Summit XIII: System Presentations Xiamen, China conference publication li-etal-2011-engtube https://aclanthology.org/2011.mtsummit-systems.2/ 2011-sep 19-23