There are factions that grow up for one reason or another and they come into conflict.

政治派系相继出现,他们之间有很多利益冲突

耶鲁公开课 - 古希腊历史简介课程节选

But they're all important for health in one reason or another.

但它们对健康都是有重要意义的

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选