Scientists speculate that in the RNA World, self--replicating RNA molecules evolved and eventually gave rise to more complex life forms.

科学家推测，在RNA世界中，自我复制的RNA分子不断进化并最终产生了更复杂的生命形式。

Chapter 4: From Soup to Cells: Enter the RNA World While the primordial soup theory explains how the building blocks could form, another leap was needed to go from a soup of organic molecules to self--replicating life.

第四章：从汤到细胞：进入RNA世界虽然原始汤理论解释了构建块是如何形成的，但从有机分子汤到自我复制生命还需要另一次飞跃。