This is how grass can grow, given unlimited sunshine and water. 这里让我们见识到了如果有足够的阳光和雨水 草能够长到什么程度
Speeding up the action reveals how these huddles constantly shift and change 在快镜头下我们可以看到包围圈在不断地变动
So how on earth does a plant-eater this size survive in a place apparently totally devoid of vegetation? 那么在地球上 如此巨大的植食动物是如何 在这个寸草不生的地方生存的呢
How do the cacti survive without rain? 仙人掌为何能在这个无雨地带生存
so it's only now that you can judge just how much life there can be in the desert. 所以只有此时你才能判断 沙漠中究竟有多少生物
This thermal image shows just how effective the process is. 这幅热影像能证明这种方法非常有效
who knows how many Lechuguillas are still waiting to be discovered? 谁知道还会有多少个龙舌兰洞 等着人们去发现呢
shows us once again how complex and surprising the underground world can be. 再一次向我们展示了地底世界 是多么的复杂和惊人
that made scientists question how these caverns were formed. 使科学家们产生了 这个巨洞如何形成的疑问