down feather
英汉例句
- In a plumulaceous feather, barb ridges grow straight without any helical movement.
在羢羽上,羽枝脊則直直生長,不做螺鏇形移動。 - 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,羢羽,蟎類,化學品,以及各種食品。