名词
中文翻译：Unknown
同义词：
['mean', 'average', 'norm', "median例句：1. The team's performance is an average of 70%.（该队的表现在70%左右。）"]
例句：
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1. The team's performance is an average of 70%.
该队的表现在70%左右。
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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 75 years.
人类的平均寿命大约为75岁。