Usage Note
Desarrollar is fully regular -ar. The reflexive desarrollarse means 'to take place, to unfold' when referring to events: la acción se desarrolla en Madrid ('the action takes place in Madrid'). The related noun is desarrollo. Note the double ll, pronounced as a 'y' sound throughout the Spanish-speaking world.
Examples
"El equipo ha desarrollado una nueva tecnología."
Natural Translation
The team has developed a new technology.

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