Universal Simultaneous Machine Translation with Mixture-of-Experts Wait-k Policy Shaolei Zhang author Yang Feng author 2021-11 text Proceedings of the 2021 Conference on Empirical Methods in Natural Language Processing Marie-Francine Moens editor Xuanjing Huang editor Lucia Specia editor Scott Wen-tau Yih editor Association for Computational Linguistics Online and Punta Cana, Dominican Republic conference publication zhang-feng-2021-universal 10.18653/v1/2021.emnlp-main.581 https://aclanthology.org/2021.emnlp-main.581/ 2021-11 7306 7317