0ut in the open, communal calving is the safest way to have young. 在毫无遮挡的草原上若想安全地繁衍 最佳方法是集体照看
but once a year they come together to have their young. 然而 每年总有一次 这些它们将会聚集在一起 繁衍后代
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.
Those that survive their first year have the best possible start in life 那些在第一年里 存活下来的小企鹅有着最光明的前途
Those chicks that do have parents quickly learn survival skills. 而有父母的小企鹅很快就要学习生存的技能
Some orphans receive too much mothering from penguins whose own chicks have not survived. 有些失去亲鸟的小企鹅受到了母鸟们过分的关注
but the males have not eaten for nearly four months. 但是雄企鹅已经四个月没有进食
Their appalling trials have all been for this. 它们所经受的可怕考验就是为了这一刻
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