a short, fine, and undeveloped hair covering the animals' body, used for insulation, camouflage, and sensory perceptiona short, fine, and undeveloped hair covering the animals' body, used for insulation, camouflage, and sensory perception 1绒毛, 细毛
a short, fine, and undeveloped hair covering the animals' body, used for insulation, camouflage, and sensory perception