名词
中文翻译：等级
同义词：
['grade', 'rank', 'category', 'class']
例句：
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1.The company has a three-tieredsalary structure.
这家公司有三级工资结构。
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2. Thestudents are ranked by their performance in theexams.
学生们根据他们在考试中的表现被排名。
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3. The team is divided into differentcategories based on their skills.
这个团队根据他们的技能被分为不同的类别。