In the 14th century high temperatures make the polar ice melt polar bear population rise but human economy high speed development
＂在14世纪全球气温极高 使两极冰川全部融化 但人类经济却高速发展 北极熊数量上升＂ 用英语怎么说
In the 14th century high temperatures make the polar ice melt polar bear population rise but human economy high speed development