名词短语
中文翻译：比平均水平更高的纯度
同义词：
['higher-than-average', 'superior-than-average']
例句：
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1.The new product has a better-than-average performance.
这款新产品的性能比平均水平更高。
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2. The company's products are known for their higher-than-average quality.
该公司的产品因其高于平均水平的质量而闻名。
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3.This research shows that the environment is better-than-average in terms of pollution control.
这项研究显示，在污染控制方面，环境比平均水平更好。