<prompt> Translate the following text to EnglishHali ya ziwa au kijito inaboresha wakati ANC inaongezeka, ikihama kutoka kwa asidi ya muda mrefu hadi asidi ya vipindi.  <response>: The condition of a lake or stream improves as the the ANC increases, moving from chronically acidic e? episodically acidic e? not acidic. 