It is precisely these supranational institutions that are the best guarantee for the respect of the agreed rules in a union of sovereign states.

这些超国家机构是确保我们这个主权国家联盟的各种约定的规则得到尊重的保证。

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Rules on family migration (covering immigrants from outside the European Union) are entering a period of upheaval.

家庭迁移（从欧盟外的国家移入者）的规定进入了一个大的调整期。

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Thousands have migrated westward to seek a better life, particularly as the expansion of the European Union has allowed them to take advantage of freedom-of-movement rules.

为了寻求更好的生活，数千名吉普赛人已经向西迁移。尤其是欧盟的扩张，可以让他们利用扩张中的自由迁徙规则。

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The move occurred just days after the European Union announced a review of rules that could make it easier for airlines to avoid expensive passenger compensation requirements when flights are cancelled for reasons well beyond their control.

BBC: US strengthens airline passenger rights

First, they create legal certainty by replacing the current patchwork of laws in Europe with a single set of rules for all 27 European Union countries.

CNN: How Europe is dealing with online privacy

The European Union has postponed a planned extension of rules that require airlines to pay for their carbon emissions to include flights to and from non-EU destinations.

BBC: EU suspends extension of plane emissions trading rules