名词
中文翻译：Unknown
同义词：
['common', 'general', 'typical', 'ordinary']
例句：
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1.The average temperature in winter is around 0°C.
冬天的平均温度大约是0°C。
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2. The average income of a doctor is higher than that of a lawyer.
医生的平均收入比律师高。
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3. The average lifespan of humans is about 75 years.
人类的平均寿命大约是75岁。