The theory of abiogenesis suggests that life originated from non-living matter through natural processes.
自然发生说表明生命通过自然过程从非生命物质中起源。
In contrast to abiogenesis, biogenesis is the theory that life arises only from pre-existing life.
与自然发生说相对，生物发生说是生命仅从已有生命起源的理论。