they gradually warm and begin to support more life. 河水渐渐变暖 养育的动物也多了起来
By midsummer its larger, more famous relative, has retreated into a cave. 到了仲夏 它那更大更有名的亲戚 便会躲进山洞
But these forests hold fewer challenges for the more mobile. 不过这些森林对于更灵活的动物来说 却没有什么挑战性
K2 and her sister peaks have claimed more lives than any others. 乔戈里峰和它的姊妹峰夺去的生命 比其它山峰都要多得多
But at dusk the plateau becomes a more dangerous place. 可是一到傍晚 高原便成了 一个危机四伏的地方
But you need more than a head for heights to survive up here. 不过在这样的高度 要想活下去可不太容易
the sun once more rises over Antarctica. 太阳重新在南极上空升起
but it contains more than 50 percent of all its plants and animals. 但其中的动植物种类却占到了全球的50%