<prompt> Translate the following text to SwahiliThe U.S. has been able to invest more than it saves by borrowing from abroad, but economists question whether this is a viable strategy for the long term.  <response>: Marekani imeweza kuwekeza zaidi ya inavyohifadhi kwa kukopa kutoka nje, lakini wachumi wanauliza ikiwa hii ni mkakati unaoweza kutekelezwa kwa muda mrefu. 