0 the thick hair that covers the bodies of some animals, or the hair-covered skin(s) of animals, removed from their bodies -- (動物的)毛,毛皮
1 a hard pale grey substance that can form on the inside of water pipes, kettles, etc. -- 水垢
2 a greyish covering on the tongue, caused by illness or by smoking cigarettes -- 舌苔
3 If water pipes, kettles, etc. fur, a hard grey substance forms on the inside. -- (水管、水壺等)生水鏽,結水垢
The animal's thick fur provides very good insulation against the arctic cold.
Personally , I don't think animals should be killed for their fur.