"soft feathers" 英文表达为 "soft plumage"。
"plumage" 是指鸟类羽毛的总称，来源于拉丁语 "plumarius"，意为 "羽毛的"。
例句：
The bird had soft plumage that ruffled in the wind. (这只鸟有柔软的羽毛，在风中起皱。)
The soft plumage kept the baby chick warm in the nest. (柔软的羽毛让小鸡在巢中保持温暖。)
The bright colors of the peacock's plumage make it stand out in the crowd. (孔雀的明亮羽毛色彩使它在人群中脱颖而出。)