History says that monetary unions often break up .

历史告诉我们，货币联盟常常分崩离析。

Eight other states offer civil unions that are legally equivalent to marriage .

还有八个州也向居民联合会提议了婚姻面前应该人人平等。

Currency unions in europe itself have proved temporary .

历史已经证明，欧洲的货币联盟不过是昙花一现。

Nonetheless , america 's unions have already declared their opposition .

虽然如此，美国联盟已经宣布了他们的反对。

Both unions will be emboldened by a growing political row .

政治争论的上升趋势将使这两个联盟变得有胆量。