unclear points and will update the paper accordingly in the final version. architectures from CycleGAN [38]: 9 residual blocks for generator and 4 convolution layers for discriminator. 2. F

We sincerely thank all the reviewers for their insightful comments to help us improve the paper. To Reviewer #2. 1. Are multiple sources more beneficial? This is largely due to the fact that domain gap also exists among different source domains. We will reorganize the layout of Figure 1 in the main paper to make it more clear. We thank the reviewer for pointing this out.