名词
中文翻译：平均数
同义词：
['average', 'mean', 'average value', 'median']
例句：
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1.The average temperature in the city is 20 degrees Celsius.
这个城市的平均温度是20摄氏度。
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2.The average income of a doctor is much higher than that of a lawyer.
医生的平均收入远高于律师。
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3. The average life expectancy for women in their 50s is 8 years less than that of men.
女性50岁平均预期寿命比男性少8年。