名词
中文翻译：平均的
同义词：
['common', 'norm', 'standard']
例句：
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1.The average temperature in winter is below freezing point.
冬天的平均温度低于冰点。
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2. The average income for 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 lifespan of humans is around 75 years.
人类的平均寿命约为75岁。