noun🔗Share底绒，绒毛。 The thick, soft undercoat of some mammals, especially those that spend time in the water"The beaver's thick underfur keeps it warm even in the icy river. "海狸厚厚的底绒即使在冰冷的河里也能让它保持温暖。animalbodybiologynaturepartChat with AIVocabulary GamePractice Reading
