必背句型:

A:Public international law has been regarded as a system of principle and rules.
国际公法一直被视为一套原则和规则。
B:Is it used for every country?
它在每个国家都适用吗？
Public international law has been considered as a system of principle and rules.
国际公法一直被视为一套原则和规则。
Public international law has been known as a system of principle and rules.
国际公法一直被视为一套原则和规则。
The industry has been regarded as service industry.
这个行业被视为服务业。

延伸阅读:
A:The beginnings of international law as it is known today are usually traced to the 16th and 17th centuries.
如今的国际法的起源可以追溯到16和17世纪。
B:It has a long history.
它有很长的历史了。
The beginnings of international law as it is known today are usually dated back to the 16th and 17th centuries.
如今的国际法的起源可以追溯到16和17世纪。
The event is dated back to the 16th century.
这件事可以追溯到16世纪。
The event is traced to the 16th century.
这件事可以追溯到16世纪。