名词中文翻译
中文翻译：等级线
同义词：
['grade boundary', 'grade line', 'academic line', 'academic boundary']
例句：
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1.The student's gradeline is at the top of the class.
这个学生的年级线在班上是最高的。
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2. The teacher drew a gradeline on the blackboard to indicate the correct answers.
老师在黑板上画了一条等级线，用来表示正确答案。
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3. The students are expected to maintain their gradelines throughout the semester.
学生们被期望在整个学期内保持他们的年级线。