英语词汇“grade down”的翻译、意思、用法、释义-英汉汉英双解词典

单词	grade down
释义	grade down短语¹⁴⁴⁹⁷²⁺² 基本例句降低…的等级 Actually, it has not only kept the superior grade down but also overcomes the inflammable shortcomings, using very safe and convenience. 它保留了“微胶囊包覆红磷”的优良性能的同时，克服了易起火的危险性，使用安全方便。 e-998
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