这张照片里，位于新加坡动物园才两周大的环尾狐猴紧紧的贴在它妈妈的身上。

In this photo, a two-week-old ring-tailed lemur clings on to its mother at the Singapore Zoo.

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而雄性环尾狐猴几乎是漠不关心。

Ring-tailed lemur males could care less.

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在野生动物园睡觉的环尾狐猴。

Ring-tailed lemurs sleep in a wildlife park. Credit: Flickr/Daves Portfolio

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从那之后，类似能用于鱼类、蜥蜴、环尾狐猴、恒河猴、黑猩猩——以及人类身上的情形也被发现。

Something similar has since been found to apply to fish, lizards, ring-tailed lemurs, rhesus monkeys, chimpanzees-and humans. In many of these animals, though, there is a twist.

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从那之后，类似能用于鱼类、蜥蜴、环尾狐猴、恒河猴、黑猩猩——以及人类身上的情形也被发现。

Something similar has since been found to apply to fish, lizards, ring-tailed lemurs, rhesus monkeys, chimpanzees-and humans. In many of these animals, though, there is a twist.

youdao