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$string['gradehistorylifetime'] = 'Grade history lifetime';
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$string['gradehistorylifetime_help'] = 'This specifies the length of time you want to keep history of changes in grade related tables. It is recommended to keep it as long as possible. If you experience performance problems or have limited database space, try to set lower value.';
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$string['gradeimport'] = 'Grade import';
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$string['gradeitem'] = 'Grade item';
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$string['gradeitemaddusers'] = 'Exclude from grading';
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$string['gradeitemadvanced'] = 'Advanced grade item options';