official grades 是什么意思？

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最近看到一些学校在申请上要求提供official grades:

Copy of the diplomas and official grades

Applicants who obtained degrees from institutions that gave degree classification and/or grade point average but are not shown in the certificate or transcript are required to also send copies of any other official documents that indicate their formal degree classification or grade point average

the final grades from your Bachelor's and Master's studies

official grades是什么？是成绩单上的GPA吗？还是学位证书上的东西？

谢谢