construir
Durante 20 años, estuvimos construyendo edificios como este porque no teníamos ni idea de cuánto los detestaban.  | For 20 years, we were producing buildings like this because we had no idea how much you hated it.  | 
Y en los últimos años, estuvimos construyendo estas nuevas tecnologías que se basan en el seguimiento ocular.  | And so in the past many years we've been building these new technologies that are based on eye tracking.  | 
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