<prompt> Translate the following text to SwahiliDODs current acquisition policy also states that the system demonstration phase begins after prototypes have been built and demonstrated in a relevant environment during system integration.  <response>: Sera ya sasa ya ununuzi ya DOD pia inasema kwamba awamu ya maonyesho ya mfumo huanza baada ya prototypes zimejengwa na kuonyeshwa katika mazingira husika wakati wa ushirikiano wa mfumo. 