Whole populations of animals are now forced to travel great distances in pursuit of food and warmth. 动物们成群结队踏上 寻找食物和温暖的长途旅程
And it's this tilt that creates the seasons. 正是这种倾斜造成了季节变化
the cats have been pushed to the very edge of extinction by hunting and the destruction of their habitat. 由于盗猎和栖息地遭到破坏 这些大猫已经被推到了灭绝的边缘
and these leopards are not above scavenging from a corpse. 这些豹子不会介意吃死鹿的肉充饥
and there's no concealing vegetation. 也没有可以隐蔽的植被
The cub is a year old and still dependent on its mother. 小豹已有一岁大了 仍旧依靠着它的母亲
and these forests are bustling with life. 森林中一片生机勃勃的景象
Broadleaves are much easier to eat and digest 阔叶树的树叶更容易食用和消化
and at 50 degrees of latitude a radical transformation begins. 北纬50°的地方是一场重大变革的起点