听力原文

The alpha male has seen it all before. He's not in the least bothered.
猴王早就看穿了一切。它全然一副眼不见心不烦的样子。
But someone, or something, is watching, with a less than friendly interest. The Chinese moccasin is an ambush predator with a deadly bite.
然而却有人虎视眈眈地注视着。五步蛇是拥有死亡之吻的暗杀者。
This is one of China's largest and most feared venomous snakes. But the monkeys have lived alongside these dangerous serpents for thousands of years.
这是中国最大最恐怖的剧毒蛇之一，但是猴子们已经与这种危险的毒蛇共存了数千年。
They use this specific alarm call to warn each other whenever a snake is spotted.
每当发现有这种斑点的蛇时，它们就用这种特殊的叫声来相互警告。
Once its cover is blown, the viper poses no threat to the monkeys, now safe in the treetops. And life soon returns to normal.
一旦警报响起，毒蛇的袭击便对猴子丧失了威胁。一切归于平静。

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重点讲解

重点讲解：
1. in the least
丝毫；一点儿；
eg. I'm not in the least bit touched by the Marilyn Monroe kind of beauty.
我对玛丽莲·梦露那种美一点儿都不动心。
eg. I don't think you need to worry in the least.
我看你一点也不用着急。
2. pose a threat to
对……构成威胁；
eg. This could pose a threat to jobs in the coal industry.
这可能会给煤炭产业的就业造成威胁。
eg. Uranium occurs naturally throughout the world, but is normally only present in low background levels which pose no threat to human health.
天然铀广泛分布在自然界中，但正常情况下其环境背景值很低，对人体健康无害。
3. return to
返回，回到；
eg. At the end of my term of enlistment I decided to return to civilian life.
在我退役的时候，我决定复员过平民生活。
eg. Once most wires are bent out of shape, they don't return to the original position.
大多数金属丝一旦弯曲变形就无法恢复原状。