pure birth process

例句：

1. 1. The study ofthe pure birth process is crucial for understandingthe origins of life.
   研究纯生过程对于理解生命的起源至关重要。
2. 2. The pure birthprocess is a complex and delicate stage inthe development of a new organism.
   纯生过程是新生物发展过程中一个复杂而微妙的阶段。
3. 3. The pure birth process involves theuninterrupted growth and development ofan embryo from conception to birth.
   纯生过程涉及从受精到出生胚胎不间断的生长和发育。