There are many methods to evaluate water environment quality. The gray relation method mainly reflects the correlation degree between sample and environmentalcriterion.
Recently, a new concept "environmental image" has come into being and become an important criterion with which to evaluate a city.
最近，一种新的“环境形象”的观念已经形成并且成为评估一座城市的重要标准。
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The photolysis and hydrolysis of triacontanol (TA) were studied in laboratory in accordance with the criterion for chemical pesticide environmental safety assessment.