Contrastive Learning for Many-to-many Multilingual Neural Machine Translation Xiao Pan author Mingxuan Wang author Liwei Wu author Lei Li author 2021-08 text Proceedings of the 59th Annual Meeting of the Association for Computational Linguistics and the 11th International Joint Conference on Natural Language Processing (Volume 1: Long Papers) Chengqing Zong editor Fei Xia editor Wenjie Li editor Roberto Navigli editor Association for Computational Linguistics Online conference publication pan-etal-2021-contrastive 10.18653/v1/2021.acl-long.21 https://aclanthology.org/2021.acl-long.21/ 2021-08 244 258