英语单词“grade up”的翻译、意思、用法、释义-英汉词典

单词	grade up
释义	grade up1.■挑选，分等级：The apples were graded up before being sent to market.苹果在上市前被分了等级。2.■升级，升等：All students in this class will be graded up.这个班的所有学生都将升级。3.■【畜牧业】(把杂种、劣种动物)与纯种杂交改良：He graded up his herd.他使他的牛与良种牛交配。
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