<prompt> Translate the following text to EnglishMiradi ya muda mrefu, kama vile retrofits ya zaidi ya kitengo moja katika tovuti moja, pia kutoa wenyewe kwa ufanisi wa ziada kutoka curves kujifunza.  <response>: Long-term projects, such as retrofits of more than one unit at one site, also lend themselves to additional efficiencies from learning curves. 