名词
中文翻译：平均数
同义词：
['average', 'mean', 'median', 'average value']
例句：
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1. The company's profits have been steadily increasing over the past year.
这家公司的盈利在过去一年内稳步增长。
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2. The average temperature in winter is around -5°C.
冬季的平均温度约为-5°C。
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3. The average lifespan of a human being is about 70 years.
人类的平均寿命大约是70年。