Before revision:  In the text classification experiments of BERT and RoBERTa, MixADA achieves significant robustness gains under two strong adversarial attacks and alleviates the performance degradation of ADA on the original data.
After revision:  In the text classification experiments of BERT and RoBERTa, MixADA achieves significant robustness gains under two strong adversarial attacks and alleviates the performance degradation of ADA on the clean data.