down feather
英漢例句
- In a plumulaceous feather, barb ridges grow straight without any helical movement.
在羢羽上,羽枝脊則直直生長(zhǎng),不做螺鏇形移動(dòng)。 - Common allergens include pollen, animal dander, down feathers, mites, chemicals, and a variety of foods.
常見(jiàn)的過(guò)敏原包括花粉,動(dòng)物皮屑,羢羽,蟎類,化學(xué)品,以及各種食品。