The person who coined that phrase had likely observed beavers at work damming a stream or building their home. Indeed, these animals seem tireless as they cut trees and haul the pieces to the construction site.
Ja pavēro, kā bebri ceļ aizsprostu vai būvē mājokli, grauzdami un gāzdami kokus un vilkdami tos uz savu ” būvlaukumu ”, šie dzīvnieki šķiet nenogurdināmi.