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"Acabar de" is a transitive verb phrase which is often translated as "just", and "detectar" is a transitive verb which is often translated as "to detect". Learn more about the difference between "acabar de" and "detectar" below.
acabar de()
A transitive verb phrase is a phrase that combines a verb with a preposition or other particle and requires a direct object (e.g., take out the trash.).
detectar()
A transitive verb is a verb that requires a direct object (e.g., I bought a book.).