had conduced
-había conducido
Past perfectconjugation ofconduce.There are other translations for this conjugation.

conduce

After several years, they took samples of these lichens and conducted the same chemical tests as they had conduced several years earlier to gather data on air quality in these different locations.
Después de varios años, tomaron muestras de estos líquenes y llevaron a cabo las mismas pruebas químicas que habían hecho varios años atrás para tomar datos de la calidad de aire de estos diferentes lugares.
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