名词短语
中文翻译：每日平均速率的变动
同义词：
['average daily rate', 'average daily variation']
例句：
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1. The company's mean weekly sales have increased by 20% since the beginning of the year.
自年初以来，该公司的平均周销售额已增长了20%。
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2.The mean temperature for this region is 25 degrees Celsius during summer and -5 degrees Celsius during winter.
该地区夏季的平均温度为25摄氏度，冬季的平均温度为-5摄氏度。
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3.The mean annual rainfall in this area is 1000 millimeters, which is significantly less than the surrounding areas.
该地区的年均降水量为1000毫米，远低于周边地区。