<prompt> Translate the following text to SwahiliSecond, the cost of maintaining a trained full-time field worker at a site runs high, so that evaluators had to settle for shorter observations or untrained field workers or both.  <response>: Kwa upande mwingine, gharama za kuhifadhi mfanyakazi wa shamba aliyefundishwa kwa wakati wote kwenye tovuti ni kubwa, kwa hivyo watathmini walihitaji kuridhika na uchunguzi mfupi au wafanyikazi wa shamba wasiofundishwa au wote wawili. 