名词
中文翻译：总体平均数
同义词：
['average', 'mean', 'median']
例句：
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1.The overall average score for the test is 70 out of 100.
这次考试的总体平均分是70分。
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2.The company's overall average profit margin has increased by 5% since last year.
公司的整体平均利润率从去年增加了5%。
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3.The overall average age of the population is increasing due to better healthcare and education.
由于更好的医疗保健和教育，人口的平均年龄正在上升。