名词
中文翻译：不及格的等级
同义词：
['failing grade', "unsatisfactory grade例句：1. The student's performance in the exam was a ducational failure.（学生的考试成绩是一次教学失败。）"]
例句：
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1. The student's performance in the exam was a ducational failure.
学生的考试成绩是一次教学失败。
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2.The company's financial report showed a failing grade for the quarter.
公司的财务报告显示这个季度的成绩是不合格的。
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3. The teacher gave the student an unsatisfactory grade for his poor work.
老师对学生的作业给出了不满意的等级，因为他的工作很差。