名词
中文翻译：年龄分层
同义词：
['age grouping', 'age stratum', 'age cohort']
例句：
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1. The studyrevealed a significant difference in age gradation between the two groups.
研究发现两组之间在年龄分层上存在显著差异。
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2.The company is focusing on age gradation to improve customer satisfaction.
该公司正致力于年龄分层，以提高客户满意度。
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3. The research team conducted an age gradation survey to understand the needs of different age groups.
研究团队进行了一项年龄分层调查，以了解不同年龄段的需求。