But under their fur, polar bears have black skin-the better to soak in the sun's warming rays.
不过，在北极熊毛皮下的皮肤却是黑色的，这有利于吸收温暖的阳光。
2
It's a compound of natural polar mineral material and multifunctional ceramic material can be more effective with far infrared rays that was eradiated by natural polar mineral.