12 篇文章
Within a few days they develop spots of pigment which, when they're adult, they will use to communicate with one another.
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Within a few days they develop spots of pigment which, when they're adult, they will use to communicate with one another. 几天后它们长出一些色斑 等到成熟后,就可以用这些色斑来互相联系

can take many thousands of years to develop.
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can take many thousands of years to develop. 经历了数千年的形成过程