These are the most numerous birds on Earth. 这些鸟是地球上数量最多的鸟
The gazelles move on to new pastures and leave the desolation behind them. 瞪羚们远离了这片狼籍不堪的荒芜之地 继续行进 寻找新的草原
Without trees, eagles have to nest directly on the ground. 没有了树,鹰只能直接把巢安在地面上
Predators also have a hard time raising their young on open grassland. 掠食动物在这片空旷的草地上繁衍后代也并不轻松
The plains of our planet support the greatest gatherings of wildlife on Earth. 草原维系了我们行星最丰富多彩的生命群落
and now look ready to take on the world. 它们已经做好了当上这个世界的主人的准备
The chicks grow quickly on a diet of fish and squid. 小企鹅长得很快,吃小鱼和鱿鱼
Thirty days after it last set, the sun rises once more on Antarctica. 南极洲的太阳在落山30天后 再次升起
who are still huddling, defying the coldest conditions on the planet. 它们还挤在一起面对着地球上最严酷的挑战