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。

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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.

它是由多种天然极性矿物材料和多功能健康材料复合而成，并添加稀土元素，与天然矿物材料辐射的远红外线性能协同增强。

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These include polar bears, rays and sharks that are heavily fished for shark fin soup.

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