Caves are one of the few habitats on Earth not directly powered by sunlight. 洞穴是地球上少数几种 不直接依赖阳光的生态环境之一
Originally, this whole area would have been one solid block of limestone, 起初 这整个地方都是 一整块坚固的石灰岩床
One kind of rock makes this whole underground world possible - 这些地底世界之所以会存在 都是因为一种岩石
and form one of the most productive habitats on the planet. 成为地球上一处 最肥沃的野生动物栖息地
The rose-eared spoonbill is just one of the 650 bird species found in the Pantanal. 粉红琵鹭是潘塔纳尔沼泽地中的 650多种鸟类中的一种
is one of the widest waterfalls in the world - 是世界上最宽的瀑布之一
where one massive tributary, the Rio Negro, flows into the main river. 一条巨大的支流 ——内格罗河在此汇入干流
400 miles long and over a mile deep, Baikal contains one fifth of all the fresh water found in our planet's lakes and rivers. 贝加尔湖长400英里 深度超过1英里 其中淡水储量占到了全球江河湖泊淡水总量的1/5
all of which evolved from just one single ancestor isolated here thousands of years ago. 它们都是从一个数千年前 即被隔绝在此的祖先进化而来的