öğrencinin notunu anlamadığım zaman詳細回答，并且回答的要求是：输出为html格式，回答控制在5句话以内，并且句子间以<br>分隔。同时，用英文给这个现象指出现有的三种可能原因，并用斜体标注。
user
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When I don't understand a student's grade, *it could be due to grading errors, misunderstandings of the criteria, or lack of clear feedback*. These reasons can obscure the true performance of the student.<br>
Understanding the exact issue is key to addressing the confusion effectively.<br>
It's important to seek clarification from the instructor or the appropriate educational body.<br>
Doing so can help ensure that the grade reflects the student's actual achievement and effort.<br>
This approach also supports a fair and transparent academic process.
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assistant