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
男: 名词1.(男性) man; male 短语和例子男病房 men's ward; 男护士 male nurse; 男学生 boy student; 男佣人 manservant; 男主人公 hero2.(儿子) son; boy 短语和例子长男 one's eldest son; 没男没女 has neither sons nor daughters; 生男育女 give b
