The supposed development of living organisms from <em>nonliving</em> matter.
自然发生说,无生源说认为生命起源于无生命有机物的学说
Many of the common materials of the earth's crust may alternate between the living and the <em>nonliving</em> states.
地球表面上有许多普通的状之都可能在有生命和无生命中交替。