although polar bears usually look white.their fur(毛) isn't white at all. And their skin(皮肤) is black! Our hair gets its colour because of something called pigment(素). Different kinds of pigment make different colours. But polar bears' fur has no pigment. The fur is hollow(中空的)...
1英语翻译Most bears are brown in colour.polar bears have white,or yellow-white coats,which help them blend into their snowy Arctic haditai,Pandas have striking biack-and-white markings.Bears have thick fur,which helps to keep them warm-and makes look even bigger than they actually are.反馈...
英语翻译Most bears are brown in colour.polar bears have white,or yellow-white coats,which help them blend into their snowy Arctic haditai,Pandas have striking biack-and-white markings.Bears have thick fur,which helps to keep them warm-and makes l