形容词
中文翻译：意为
同义词：
['average', 'common', 'ordinary', 'average-sized', 'moderate']
例句：
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1. The mean temperature for this region is 25 degrees Celsius.
该地区的平均温度是25摄氏度。
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2. The mean lifespan of a human being is around 75 years.
人类的平均寿命大约是75岁。
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3. The mean income of the country's citizens is significantly higher than the national average.
该国公民的平均收入远高于全国平均水平。