As we go back, we find more and more in men the traits of gregarious animals;
当我们回顾时，我们发现越来越多的人们中间如群居动物般的部落；
The gregarious animals are also vulnerable to human diseases, such as tuberculosis, cholera and measles, Yang said.
杨说，这些群居的动物同样容易受到人类的一些疾病的攻击，比如说肺结核，霍乱以及麻疹。
These animals are highly gregarious.
这些动物非常喜欢群居。
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