名词
中文翻译：标准的
同义词：
['norm', 'normative', 'regulated']
例句：
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1. The standard for measuring the lengthof a ruler is 20 cm.
测量尺的标准长度是20厘米。
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2.The company has adopted a new standard forits products.
该公司已采用新产品的新标准。
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3.The standard deviation is used to measure theamount of variation in a set of data.
标准差用于衡量一组数据中的变异量。