在野外，它们是合作的群居物种。
原句中，前面是论点后面是论据，学习合适的社会行为对群居物种很重要，举猴子的例子。
D. Monkeys and other social animals need to learn behaviors appropriate for their social groups.
原句中，前面是论点后面是论据，学习合适的社会行为对群居物种很重要，举猴子的例子。
D. Monkeysand other social animals need to learn behaviors appropriate for their social groups.
这并不奇怪，因为人类只是众多群居物种中的一个，没有任何原因只有人类能把笑作为一种社交工具。
This is not too surprising, because humans are only one among many social species and there's no reason why we should have a monopoly on laughter as a social tool.
我们的文化赞美个人主义和自力更生，但人类是一种敏感的群居物种，相处良好的关系让人精神抖擞，孤独的人则感到痛苦。
We live in a culture that celebrates individualism and self-reliance, and yet we humans are an exquisitely social species, thriving in good company and suffering in isolation.
在野外生存条件下，卷尾猴是合作生活的群居物种，这样的合作很可能只有在每个动物个体都感到自己没受到背叛的情况下才可能稳定维系。
In the wild, they are a co-operative, group-living species. Such co-operation is likely to be stable only when each animal feels it is not being cheated.
我们知道，人类一直是群居的；如果没有这种安排，我们的物种很早之前就灭绝了。
Humans, as we know, have always lived in groups; without this arrangement, our species would have died out long ago.
他们没有证明一夫一妻制会使物种趋向群居。
They do not prove that monogamy predisposes species towards eusociality.
或者以非常罕见的群居寄生虫形式生活在其他物种巢穴中的蚂蚁。
Or existing as very rare social parasites in the nests of other species.
已经在伦敦各郡建立群居点的和尚鹦鹉因为被认为威胁作物、电网及本土物种将受到清除。
Monk parakeets, which have established colonies in the home counties, are to be culled because they are alleged to pose a danger to crops, the electricity grid and native species.
北美驯鹿以小群居的形式生活在林地，目前这一物种已濒临灭绝，仅存于加拿大北部地区及美国的阿拉斯加州。
These woodland caribou live in small, threatened herds that are confined to northern Canada and Alaska.
当然了，你可以只按字面意思理解。三角龙是这类群居恐龙中最著名的，但随着大陆继续缓慢的分离漂移，所有不同的物种都在进化，都有着伊丽莎白时代样式的褶皱和角。
Triceratops is the most famous of these herding dinosaurs but as the continents continue their slow drift apart all different species evolved... all with their own Elizabethan-type frills and horns.
当然了，你可以只按字面意思理解。三角龙是这类群居恐龙中最著名的，但随着大陆继续缓慢的分离漂移，所有不同的物种都在进化，都有着伊丽莎白时代样式的褶皱和角。
Triceratops is the most famous of these herding dinosaurs but as the continents continue their slow drift apart all different species evolved... all with their own Elizabethan-type frills and horns.
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