0 a thick covering for the top of a bed, filled with soft feathers or warm material -- 鸭绒垫,鸭绒被
She snuggled beneath the eiderdown. 她舒适地蜷伏在鸭绒被下面。
We can complete it step by step however long the road is and it can't be completed however short the road is if you don't even mark your footprint.
再长的路,一步步也能走完,再短的路,不迈开双脚也无法到达。