Before revision:  Therefore, to incorporate adversarial trainingin sequence-level tasks, we introduce a novel training strategy: Text Adversarial Training with token-level perturbation. We fist craft perturbations that are initialized using a fine-grained token-level accumulated perturbations.
After revision:  Therefore, to incorporate adversarial trainingin sequence-level tasks, we introduce a novel training strategy: Text Adversarial Training with token-level accumulated perturbations.