Translate the following English sentence to French:
"As you know, the European Council, meeting in Helsinki, has confirmed that it is essential for Turkey firstly to comply with the political accession criteria if its relations with the European Union are to become any closer."
Comme vous le savez, le Conseil européen d'Helsinki a insisté sur le fait que le respect des critères politiques d'adhésion constitue une condition indispensable à l'intensification des relations entre l'Union européenne et la Turquie.