that have begun to shape the ice worlds of our planet remains to be seen. 适应已经开始影响这个冰雪世界的变化的准备, 还不得而知.
0nce an extremely rare sight, polar bears have recently been seen over 60 miles from the shore. 曾经有人在离海岸60英里处发现了北极熊 这种事情是极难碰到的
They were about to discover some of the most exquisite formations ever seen underground. 因为他们发现了一些 地底世界中最精美的构造
and show you the planet and its wildlife as you have never seen them before. 展示这个星球的风貌 和你以前从未见过的野生动物