They must be recognized by the people among whom they lived, by the communities in which they live.

他们必须被他们周围的人认可,被他们所生存的集体所认可

耶鲁公开课 - 古希腊历史简介课程节选

When they thought it was necessary, they maintained peace by destroying communities and forcibly moving populations.

一旦他们觉得有必要，就会为了维护和平，毁灭其他群体,强制迁移人口。

耶鲁公开课 - 新约课程节选

In this way, by knowing what communities it's in and acting on all of them at once you might be able to eradicate polio in the same way that we eradicated smallpox.

因此,通过知晓疾病的所在群体,并且一次性对整个群体做免疫尝试,也许那就可以像根除天花那样,根除小儿麻痹症

耶鲁公开课 - 生物医学工程探索课程节选