When you use those feathers, especially in a blanket, as a part of the construction of the blanket, as part of how the blanket keeps you warm, we would call those feathers " down" .

当你使用这些羽毛时， 尤其是在毯子里，作为毯子结构的一部分， 作为毯子保暖的一部分， 我们会称这些羽毛为“羽绒” 。