English-Portuguese translations for keystone

pedra angularO mercado único é a pedra angular, a plataforma da nossa economia. The Single Market is the keystone, the platform of our economy. Esta directiva é, na realidade, a pedra angular da política energética europeia. This directive is, in actual fact, the keystone of European energy policy. A questão do financiamento tornou-se a pedra angular do acordo de Copenhaga. The issue of funding has become the keystone of the agreement in Copenhagen.

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