Hello World

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请问在stdcnet.py文件里面的STDCNet1446最后返回的feat2, feat4, feat8, feat16, feat32, idx0_de, idx1_de, idx2_de后面三个是什么意思？

![image](https://user-images.githubusercontent.com/93105912/202892965-19486837-6520-4112-b4d9-32e3c9467cb1.png)