they have concentrated
-se sont concentrés
Present perfect they conjugation of concentrate.

concentrate

Accordingly, they have concentrated their attention on AdWords.
C’est pourquoi ils ont concentré leur attention sur AdWords.
I thank all Members for their interesting contributions. They have concentrated on a few topics.
Je remercie tous les députés de leurs intéressantes contributions. Ils se sont concentrés sur quelques thèmes.
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