Cornell CS PhD申请要求交degree completion certificate & diploma的疑问

Cornell的CS PhD申请材料里要求：

If your school is located outside the United States and the degree has already been awarded, include a scanned or electronic copy of your degree completion certificate and diploma. If the documents are not in English, a certified translation is required.

一般学位证学校都会给英文的，这个意思是不光要学位证，还要毕业证吗？毕业证学校一般不给翻译，这个意思是需要自己找认证的翻译，把毕业证翻译一下吗？（还是得学校官方出具）
求问这个degree completion certificate and diploma指的是学位证还是学位证+毕业证