a soft quilt usually filled with the down of the eider
同义词：duvet, continental quilt
down of the eider duck
eiderdown详细解释
eiderdown 也作 eider down n.（名词）The down of the eider duck, used as stuffing for quilts and pillows.羽绒：绒鸭毛，用作被子和枕头的芯子A quilt stuffed with the down of the eider duck.羽绒被：用绒鸭毛做芯子的被A warm, napped fabric.一种保暖且有绒毛的织物
