The international community has witnessed several different types of international power basis since Westphalia.
自威斯特伐利亚条约以来，国际社会见证了数次国际权力基础变化。
There are three types of home assignments given on a weekly basis.
每周有三种不同类型的家庭作业，一般是一周以后交作业。
There are three types of home assignments given on a weekly basis.
每周有三种不同类型的家庭作业，一般是一周以后交作业。
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