关键pytorch实现 启用指针生成和覆盖丢失的训练 训练了100k次迭代并启用了覆盖范围丢失后(批次大小8) ROUGE-1: rouge_1_f_score: 0.3907 with confidence interval (0.3885, 0.3928) rouge_1_recall: 0.4434 with confidence interval (0.4410, 0.4460) rouge_1_precision: 0.3698 with confidence interval (0.3672, 0.3721) ROUGE-2: rouge_2_f_score: 0.1697 wi