To change the conversation Levin went on to explain to Dolly a theory of dairy farming which maintained that a cow was only a machine for the transformation of fodder into milk, and so on.
Y, para eludir la charla sobre Kitty, Levin explicó a Dolly la teoría de la economía pecuaria, que consiste en que la vaca no es sino una máquina para transformar el pienso en leche, etcétera.