This impressive result vindicates the power of adversarial training to reduce the distance between two complex distributions without any direct supervision, which is also observed in other recent works for different tasks (Zhang et al., 2017;Lample et al., 2018  With the introduction of BWEs (columns 2 and 3), the performance of ADAN is further boosted.
it seems the quality of the BWEs plays an important role in CLSC.