 To solve this issue , a novel metric of distributional discrepancy (DD) is designed to evaluate generators according to the discrepancy between the generated sentences and the real training sentences.
<fluency>  To solve this issue , a novel metric of distributional discrepancy (DD) is designed to evaluate generators according to the discrepancy between the generated sentences and the real training sentences.
 To solve this issue , a novel metric of distributional discrepancy (DD) is designed to evaluate generators according to the discrepancy between the generated and real training sentences.