had been introducing
-había estado presentando
Past perfect progressiveconjugation ofintroduce.There are other translations for this conjugation.

introduce

The Republic of Moldova had for six years been developing its system for the protection of intellectual property, and had been introducing organizational, technological, economic and other measures aimed at building up infrastructure and stimulating creative activity.
La República de Moldova había estado desarrollando durante seis años su sistema de protección de la propiedad intelectual, y había introducido medidas de organización, tecnológicas y económicas, así como otras, destinadas a fortalecer la infraestructura y estimular la actividad creadora.
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