Lines of wildebeest are on the march. 一队队的角马正在迁徙途中 Each year, nearly two million animals migrate across the Serengeti Plains in search of fresh, green pastures. 每年都会有将近200万只角马横越塞伦盖蒂平原，去寻...
Fishing practice begins when the cubs are four months old. 小水獭在4个月大时就开始学习捕鱼 Only the adults have the speed and agility needed to make a catch. 只有成年水獭才具备捕鱼所需的速度和灵巧 Adults share their...
For the past five million years, 在过去的500万年中 Arizona's Colorado River has eaten away at the desert sandstone to create a gigantic canyon. 亚利桑那州的科罗拉多河冲走了大量沙石，形成一个巨大深邃的峡谷 It's ove...
A grizzly bear. From famine to feast, he's spoilt for choice. 一只灰熊。它已经很久没有打牙祭了，早就盼着这个机会 This Canadian bear is very special. 这只加拿大熊很特别 He's learnt to dive for his dinner. 它学会了潜...
Giant salamanders, the world's largest amphibian, almost two metres long. 大鲵世界上最大的两栖动物，几乎能长到2米长 They're the only large predator in these icy waters. They begin their hunt at night. 它们是这些冰水中唯一的...
Invertebrates dominate these upper reaches. 无脊椎动物统治着上游河段 The hellgrammite, its body flattened to reduce drag, 这是鱼蛉，其扁平的身体能减少水的冲击力 has bushy gills to extract oxygen from the current. 并依靠...
Fresh water's journey starts here, high in the mountains. 淡水之旅就是从这些高山之巅开始的 Growing from humble streams to mighty rivers, it will travel hundreds of miles to the sea. 涓涓细流汇集成泱泱大河，行程数百英里...
Only 3% of the water on our planet is fresh. 地球上只有3%的水是淡水 Yet these precious waters are rich with surprise. 可是这些珍贵的淡水中却充满了惊奇 All life on land is ultimately dependant upon fresh water. 所有陆地生命...
英语作文 It is generally believed that there is a good supply of fresh water. But to our disappointment, the fact is just the opposite. As we can see, the world population is growing rapidly day by day. So enough fresh water is needed to feed such a...
