So bees fly to some plants and they scrape these very, very sticky resins off the leaves, and they take them back to the nest where they cement them into the nest architecture where we call it propolis.
Les abelles volen a les plantes i graten la resina tant enganxosa de les fulles, i la porten al niu on la fan servir de cement  per a l'arquitectura del vesper, i aleshores ho anomenem pròpolis.