名词
中文翻译：纯度等级
同义词：
['cleanliness grade', 'cleanliness rating例句：1. The puritygrade of the water is very high.（水的纯度等级非常高。）2. The company has a strictquality control system to ensure the puritygrade of its products.（该公司有严格的质量控制系统，以确保其产品的质量等级。）']
例句：
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1. The puritygrade of the water is very high.
水的纯度等级非常高。
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2. The company has a strictquality control system to ensure the puritygrade of its products.
该公司有严格的质量控制系统，以确保其产品的质量等级。
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3. Thepurity grade of the soil affects thegrowth of crops.
土壤的纯度等级影响农作物的生长。