EdX 评估工具要求教师或评分员首先给100篇论文或论述题进行评分。

The EdX assessment tool requires human teachers, or graders, to first grade 100 essays or essay questions.

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因此，评分员培训过程并没有像预期的那样效果明显。

So the rater training process was not as effective as we have expected.

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因此，保证评分员信度及公正性，具有极其重要的意义。

Therefore, to ensure reliability and fairness is of great importance.

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