名词
中文翻译：Unknown
同义词：
['age group', 'ageclass', 'age cohort', 'age bracket', 'age range']
例句：
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1. The company's age-classperiod is from 18 to60 years old.
该公司的年龄组时期是从18岁到60岁。
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2.The age-class period of the studentsin this school is from six to twelveyears old.
这所学校学生的年龄组时期是从六岁到十二岁。
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3. The age-class period of the employees in thecompany is from twenty to forty years old.
公司员工的年龄组时期是从二十岁到四十岁。