Analysts say whenever the two sides agree on a new treaty, that pact must still be ratified by the U.S.Senate and the Russian Parliament - or Duma.

VOA: standard.2009.12.07

The Treaty of Westphalia officially put an end to the 30 Years War, but more than that it ratified two decisive features that would be given powerful expression by Hobbes.

威斯特伐利亚条约》正式结束了,三十年战争，比这更重要的是，出现了两个决定性的特征,霍布斯将会给这两个特征有力的解释。

耶鲁公开课 - 政治哲学导论课程节选

A document setting out rules for democratic succession was approved almost three years ago, but has been ratified by only three of the 15 countries needed to take effect.

VOA: standard.2009.10.23

The treaty will have to be ratified both by Russia's Parliament and the U.S.Senate, something President Obama and his administration are committed to achieving.

VOA: standard.2010.03.26

Many around the world believe the success of the global talks will depend heavily on the positions taken by the United States, which notably never ratified the Kyoto agreement.

VOA: standard.2009.10.13