名词
中文翻译：垂直分类
同义词：
['vertical sorting', 'vertical classification']
例句：
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1. The company has implemented a vertical tabulation system to improve efficiency.
该公司已经实施了一个垂直分类系统来提高效率。
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2. The data was vertically tabulated for easy analysis.
数据被垂直地分类，以便容易分析。
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3. The teacher used vertical tabulation to organize the students' worksheets.
老师使用垂直分类来组织学生的作业表。