名词
中文翻译：等级
同义词：
['grade', 'level', 'rank']
例句：
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1.She is at the top of her class, which means she's in the top 5%.
她的成绩在班上名列前茅，这意味着她排在前5%。
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2. The school has implemented a new system to improve academic performance at each grade level.
学校实施了一个新的系统，以改善每个年级的学术表现。
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3.At the age of 18, he was accepted into college and began his journey at the next grade level.
在他18岁的时候，他被大学录取，并开始了他的下一级教育旅程。