听力文本

This lake can be a dangerous place.
马拉维湖也是个危机四伏的地方
After dark, predatory dolphin fish emerge from their daytime lairs among the rocks.
到了晚上，掠食性的长颌鱼纷纷游出它们白天潜伏的石缝
Like packs of sharks, they're on the prowl for sleeping cichlids.
它们像是一群鲨鱼，一边游一边寻找熟睡中的慈鲷
In the darkness, these electric fish hunt by detecting distortions in the electric field they create around their bodies.
这些鱼用电在黑暗中捕猎，它们在身体周围形成电场，并感知其变化。

Any cichlid that ventures out will be snapped up.
一旦慈鲷切入电场，立刻就会成为捕食的对象
The floor of Lake Malawi drops 700 metres into an abyss.
马拉维湖底是一个深达700多米的深渊
Here in this dead zone, the larvae of lake fly midges hide out away from predators.
这个死亡地带成了幽蚊幼虫躲避天敌的庇护所
In the rainy season, they balloon up to the surface and undergo a magical transformation.
每到雨季，它们便充气浮上水面，然后经历一场不可思议的变化。

词汇解析

1.emerge from 自…出现
But respect for diversity is something that has to emerge from within a culture.
而对文化多样性的尊重又必须从一个文化内部生长出来。

2.on the prowl for 徘徊寻找
I'm on the prowl for some water records.
我在搜索一些水的记录。

3.snap up 捕食
Like its giant cousin Icadyptes, it had an hyper-elongated bill which it used to snap up fish in the ancient equatorial sea.
跟它的大型企鹅表亲伊卡企鹅一样，它也长着狭长的尖喙，在远古的赤道地区海洋中用来捕鱼。

视频及简介

淡水是我们最宝贵的资源，它决定了地球上生命的分布。同河流一起，从高高的山峰一路而降，直向大海，观看壮观的瀑布，在大峡谷里飞翔，在世界上最深的湖泊的冰雪下面探索野生的生命，见证动物行为的独特的、生动的一面：水獭和泽鳄将一决胜负。