down feather
常見例句
- In a plumulaceous feather, barb ridges grow straight without any helical movement.
在絨羽上,羽枝脊則直直生長,不做螺旋形移動。 - Common allergens include pollen, animal dander, down feathers, mites, chemicals, and a variety of foods.
常見的過敏原包括花粉,動物皮屑,絨羽,螨類,化學(xué)品,以及各種食品。 返回 down feather