1.自然发生
2.异种生殖
3.无生源说
1.the supposed production of offspring completely different from both parents
2.the existence in the life cycle of an organism of two or more alternating forms or reproductive modes, e.g. sexual and asexual cycles
1.James Cameron was driving a truck before he made his first film, Xenogenesis in 1978.
詹姆斯·卡梅隆制作出自己的处女作《异种移植》前是开卡车的。