分级: grade; classify; classification; gradation; grading; sorting; sizing; fraction 短语和例子把棉花分级 grade the cotton; 他将学生们按能力分级。 he graded the students according to ability. 牛奶是分级出售的。 milk is sold
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The graduation of air - borne - sound insulating properties and test method for windows 建筑外窗空气隔声性能分级及其检测方法
