但当他们厌倦这首歌的时候，它们中某一位大胆革新的成员们就会开始唱一首新歌。
But once they get bored of that song, an innovator in the group will start singing a new one.
他们发现，当澳大利亚东海岸的鲸鱼开始唱一首新歌，歌声会逐渐从一个群落传播到另一个群落。
They found that when the whales off the coast of eastern Australia started a new song pattern, this version gradually spread from population to population.
他们发现，当澳大利亚东海岸的鲸鱼开始唱一首新歌，歌声会逐渐从一个群落传播到另一个群落。
They found that when the whales off the coast of eastern Australia started a new song pattern, this version gradually spread from population to population.
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