名词
中文翻译：等级制度同义词
同义词：
['ranking system', 'hierarchy', 'order of magnitude']
例句：
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1. The company has implemented a new level system to improve efficiency.
该公司已经实施了一个新的等级制度以提高效率。
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2. The teacher introduced the concept of levels in the classroom.
老师在课堂上介绍了等级的概念。
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3. The students were graded based on their performance levels.
学生根据表现水平被评分。