down
The down of birds is a layer of fine feathers found under the tougher exterior feathers. Very young altricial birds are clad only in down.
鸟类的down是在坚硬的外部羽毛下发现的一层精细的羽毛。幼年的鸟身上只有down。
Powder down is a specialized type of down found only in a few groups of birds. Down is a fine thermal insulator and padding, used in goods such as jackets, bedding (duvets), pillows and sleeping bags.
羽绒粉体是一种特殊类型的羽绒,只在少数鸟类中发现。羽绒是一种很好的隔热材料和填充物,用于夹克、床上用品(羽绒被)、枕头和睡袋等。
用羽绒填充的大衣我们就叫做
down jacket或down coat啦
也有一种说法叫puffer(蓬) jacket
A down jacket or puffer jacket is a quilted, padded jacket filled with down feathers (usually duck or goose down).
down jacket或puffer jacket是一种里衬填充羽绒的衣服(通常是鸭绒或鹅绒)。