Polarbears usually subsist on seals,which they hunt from a platform of seaice.But the melting of sea ice as a result of rising globaltemperatures has made it more difficult for polar bears to hunt sealsat sea,confining the bears to land.
顶一下
(0)
0%
踩一下
(0)
0%
上一篇：返回栏目
下一篇：去旅游,哪里可以看到北极光?
