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
摇: Ⅰ动词(摇摆; 使物体来回地动) shake; wave; rock; turn 短语和例子摇船 row a boat; 摇铃 ring a bell; 摇橹 scull; 摇辘轳 turn a windlass; 摇扇子 wave a fan; 摇匀一瓶药水 shake up a bottle of medicine; 动摇人心 sway the minds of men
